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Local Authority Notices to Mariners |
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Week 11 |
Survey Operations – Morgan James 3, Boblin and Pure Chance Mariners are advised that the following vessels will be carrying out Acoustic Doppler Current Profiler (ADCP) survey and water sampling operations from 01 March 2026 until 25 March 2026, whenever the weather permits. Morgan James 3 (Callsign: MSKDS) - Between Landguard Point & Blackman’s Head Acoustic Doppler Current Profiler (ADCP) survey and water sampling operations in cross channel transects
Boblin (Callsign: MRIS4) & Pure Chance (Callsign: MJXSS2) - Cross river/estuary transects of River Stour at Bristol Buoy - Cross river/estuary transects of River Orwell at Fagbury Buoy Acoustic Doppler Current Profiler (ADCP) survey and water sampling operations in cross river/estuary transects
For more information contact Harwich VTS on VHF 71 or the vessels directly. |
Harwich Haven Authority Notices to Mariners No 22 of 2026 |
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Week 11 |
Temporary Deployment of Scientific Equipment ET- Mariners are advised that from 25 - #5 BM ET05 51° 55.983’ N 001° 18.476’ E Fl(4)Y.20s #7 BM ET07 51° 55.138’ N 001° 22.267’ E Fl(4)Y.20s #8 BM ET08 51° 56.883’ N 001° 23.537’ E Fl(4)Y.20s #9 BM ET09 51° 55.239’ N 001° 29.956’ E Fl(4)Y.20s #10 BM ET10 51° 56.951’ N 001° 33.106’ E Not marked (in deep water) The scientific instruments will stand approximately 1.7m in height above the sea bed. Mariners are advised to navigate with additional caution in this area and pass well clear of the temporary buoys. The equipment and buoys are expected to remain in position until approximately 31 March 2026. A further Notice to Mariners will be issued when the equipment and marker buoys are recovered. For more information contact Environmental Tracing (enquiries@environmentaltracing.com).
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Harwich Haven Authority Notices to Mariners No 21 of 2026
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Week 11 |
Pipe Deployment in Copperas Bay - Mariners are advised that marine operations involving the assembly and temporary deployment of a dredge material deposit pipe will be taking place in the River Stour, at Erwarton Anchorage and Copperas Bay as follows: 26 February 2026: deployment of temporary anchors in Erwarton Anchorage by multi- East Anchor, 5 tons 51° 57.060’ N 001° 13.164’ E Buoy with white LED Light & retroreflective tape West Anchor, 5 tons 51° 57.060’ N 001° 13.050’ E Buoy with white LED Light & retroreflective tape. 28 February 2026: towage of 4 x 90m length floating pipes (in parallel) to Erwarton anchorage moorings and assembly into single 360m pipe, by Willdiscover and MTS Valour (IMO: 9407299). 02 March 2026: Tow 360m floating pipe to Copperas Bay and connect to shoreline. Pipe & Mooring Locations in Copperas Bay (when deployed):
1 Dredger Connection point at Low Water 51° 56.886’ N 001° 14.118’ E 80m Pipe Length 2 Dredger Connection point at High Water 51° 56.862’ N 001° 14.094’ E 80m Pipe Length 3 Anchor Wire - 4 Anchor A1 51° 56.862’ N 001° 14.172’ E 5 Anchor A2 51° 56.844’ N 001° 14.124’ E 6 Anchor Wire - 7 Anchor B1 51° 56.754’ N 001° 14.286’ E 8 Anchor B2 51° 56.742’ N 001° 14.250’ E The dredger Sospan Dau (IMO 7711062) will be undertaking deposit of dredge material at the Copperas Bay floating pipe and to the beneficial sites in the River Stour and Orwell (diagram below).
Mariners are requested to pass at a safe distance. The dredge material deposit pipe is expected to remain in position until approximately 15 March 2026. A further Notice to Mariners will be issued when the pipe is to be removed. |
Harwich Haven Authority Notices to Mariners No 20 of 2026
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Week 11 |
Harwich Haven - Mariners are advised that survey and dredging operations are taking place as follows: GNH Crusader 2EQW Survey 20/02/26 25/02/26 Felixstowe, Harwich Harbour, Stour MTS Valour 9407299 Plough 25/02/26 20/03/26 Felixstowe, Harwich Harbour, Stour Gateway 9448994 Dredger 01/03/26 15/03/26 Felixstowe, Harwich Harbour
Contact Harwich VTS (VHF 71) for latest dredger traffic information. |
Harwich Haven Authority Notices to Mariners No 19 of 2026 |
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Week 11 |
River Medway – Upnor Reach - NOTICE IS HEREBY GIVEN … Following on from NtoM 05 of 2026 -
Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS” or telephone 0151 949 6148 or 0151 949 6650. |
Medway (Peel Ports) Notices to Mariners No 17 of 2026 |
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Week 11 |
River Medway – Saltpan Reach - NOTICE IS HEREBY GIVEN that Installation of sacrificial anodes to the berth piles by divers is due to take place at the Isle of Grain LNG Jetty 10, work is due to commence 9th March 2026 with completion expected by the end of September 2026. The operation carries significant risk to the team working on the waterline and below the surface along the face and beneath the structure of LNG Jetty 10. Craft involved will be the: ‘Avocet’ ‘Splitmoor ‘Liftmoor’ ‘Patrol’ ‘Westbourne’ Small rib tender ‘Retriever’ All craft will maintain a listening watch on VHF Channel 74 and display day signals for respective operations. All vessels passing Grain LNG Jetty 10 should navigate with caution, observe the LNG Jetty exclusion zone at all times, reduce speed and minimise wash accordingly. Admiralty Chart No.1834 refers.… Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS” or telephone 0151 949 6148 or 0151 949 6650. |
Medway (Peel Ports) Notices to Mariners No 16 of 2026
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Week 11 |
Lowestoft Bascule Bridge Scheduled Maintenance – Overnight Bridge Closures
Mariners and Port- Sun 1st to Thurs 5th March – Marine and Road Closure. Bridge lifts may be possible with +12hrs notice, timing subject to schedule of works. No small boat openings, but small boat transits may be permitted if combined with a pre- Sun 8th to Thurs 12th March – Full Marine closure. No commercial or small boat openings. Sun 15th to Thurs 19th March – Full Marine closure. No commercial or small boat openings. If required/booked in advance, additional small boat openings at 2000hrs and 0600hrs will be accommodated. Should works be completed ahead of time port users will be advised of any dates that restrictions will not be required. All vessel operators and owners are requested to carefully consider operational requirements, and to schedule vessel transits outside of the closure periods to avoid potential for delay or disruption.
Please contact Lowestoft Port Control, VHF Ch14, Tel. 01502 572286 (Option 3) if further information is required. |
Port of Lowestoft (ABP Ports) Notices to Mariners No 4 of 2026 |
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Week 11 |
Sizewell Harbour - Mariners are advised that the western extremity of the marine piling works of the Marine Bulk Import Facility (MBIF) detailed in Sizewell C Harbour Notice to Mariners No8 of 2026 have been temporarily marked by a QFl Y light atop the pile in position 52°13’15”N 001° 37’ 49”E The jack up barge Excalibur will continue piling works eastward until the jetty head installation is completed, upon which permanent navigational marking of the jetty head will be established. Subsequently the Excalibur will resume piling works on the western section of the works between the jetty head piling and the associated terrestrial piling. All of these works will be contained within the Marine Construction Zone (MCZ) as per the chart |
Sizewell C Notice to Mariners No 12 of 2026
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Week 11 |
Raysand Channel – Temporary ‘Special Mark’ Yellow Buoy. NAVIGATION Mariners are advised that a temporary ‘Special Mark’ yellow buoy with light sequence Fl(Y)5s is to be deployed NE of Raysand North buoy in the following position from 3rd March 2026 until mid- The buoy marks a seabed frame containing a current monitoring instrument to provide data to inform water quality modelling for Anglian Water Ltd. |
Crouch Harbour Authority Notices to Mariners No 5 of 2026 |
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Week 10 |
River Thames - Replacement and Lighting Update Mariners are advised that the buoys at Greenwich Ship Tier and Georges Stairs are to be replaced by the Port of London Authority. Greenwich Ship Tier On or about 26th February 2026 the upper outer (5) and upper inner (6) wing moorings at Greenwich Ship Tier will be overhauled and the existing Admiralty class buoys exchanged for larger ‘stay- On or about 3rd March 2026 the lower inner (8) and lower outer (7) wing moorings at Greenwich Ship Tier will be overhauled and the existing Admiralty class buoys exchanged for larger ‘stay- Georges Stairs On or about 5th March 2026 the upper and lower moorings (2 & 22) at Georges Stairs will be overhauled and the existing ‘stay- Requirements to proceed with caution or at slow speed will be made in accordance with the procedure set out in the Port of London Authority’s Port Information Guide under ‘Speed Reductions’, with the International Code Flags ‘Romeo Yankee’ displayed. Further details will be broadcast by London VTS on VHF Channel 14. This notice shall remain in force until the relevant chart corrections have been promulgated. |
Port of London Authority Notices to Mariners Nos M16 of 2026
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Week 10 |
Diving Operations – Harwich International Port Mariners are advised that diving operations will be taking place in the River Stour on berths Ro- . During diving operations flag Alpha will be displayed, and mariners are requested to pass slowly and keep at least 50m clear of diving operations. |
Harwich Haven Authority Notices to Mariners No 17 of 2026
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Week 10 |
Harwich Haven - Mariners are advised that on 20 February 2026 scientific equipment marked by lit yellow special mark buoys will be deployed by the workboat Haven Hornbill (callsign: VSYP7) as follows: #1 - #2 - #4 - #6 - Mariners are requested to pass at a safe distance. The equipment and buoys are expected to remain in position until approximately 31 March 2026. A further Notice to Mariners will be issued when the equipment and marker buoys are recovered. For more information contact Environmental Tracing (enquiries@environmentaltracing.com). |
Harwich Haven Authority Notices to Mariners No 18 of 2026
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Week 10 |
River Medway - NOTICE IS HEREBY GIVEN THAT: The sunken vessel recently lifted from Esplanade Pier has been successfully lifted and moved. During the lifting operation, a breach was identified in the vessel’s hull. As a result, refloating and towing is no longer a viable option. Contractors are currently assessing the situation to determine the most appropriate next steps. The vessel has been securely positioned at the location shown below; please be advised that it is not visible at high water. 51°23’.475N, 000°30’.072E Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS” or telephone 0151 949 6148 or 0151 949 6650 (Recorded Lines). |
Medway (Peel Ports) Notices to Mariners No 13 of 2026
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Week 10 |
River Medway – Chatham Reach - Notice is hereby given that diving operations will be taking place at Euro Wharf in Chatham Reach for the removal of the sheet pile wall by means of Oxy Arc burning process and the installation of Cathodic protection and are due to commence 23rd February 2026 with completion expected by 6th March 2026. Diver access and egress will be via man- All vessels passing Euro Wharf are requested to navigate with extreme caution, maintain a listening watch on VHF Channel 74 and reduce speed/wash accordingly. Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS” or telephone 0151 949 6148 or 0151 949 6650. (Recorded Lines) |
Medway (Peel Ports) Notices to Mariners No 14 of 2026
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Week 10 |
London Array Offshore Wind Farm (Outer Thames Estuary) - All mariners are advised that the Survey Vessel “Spectrum 2” will be onsite from 23/02/2026 for approximately two weeks. They will be undertaking bathymetric survey Within the London Array Offshore Windfarm Boundary consisting of 500m box surveys and 2 corridor surveys at the following locations. • B17 - • E04 - • E05 - • H12 - • H16 - • G15 - G15: Start position (Rendezvous position) – 51°38.657N- Position 2 – 51°38.633N- Position 3 – 51°38.582N- Position 4 – 51.38.512N- Position 5 – 51°38.426N- Position 6 – 51°38.375N- Position 7 (Off G15) – 51°38.296N- H16 : Start position (Rendezvous position) – 51°39.298N- Position 2 – 51°39.197N- Position 3 – 51°39.085N- Position 4 – 51°38.982N- Position 5 – 51°38.960N- Position 6 (Off H16) – 51°38.940N- Restricted Access Zones A 500m radius restricted zone will be in place, centred on the Spectrum 2 whilst conducting survey operations within the wind farm. |
London Array Offshore Wind Farm (Outer Thames Estuary) Notices to Mariners No 1 of 2026 Note B17 is adjacent to Foulger's Gat. Call up any LA vessle prior to entering. |
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Week 10 |
Inner Whitaker Lighted Buoy – River Crouch NAVIGATION Mariners are advised that the Inner Whitaker Lighted Buoy in approximate position: 51°40.757 N, 001°08.400 E is now lit. |
Crouch Harbour Authority Notices to Mariners No 4 of 2026 |
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Week 09 |
Brightlingsea - Mariners are hereby advised that Brightlingsea Harbour, in conjunction with dredging contractor Van Oord, will be conducting dredging operations within Brightlingsea Marina and Harbour. Operations are scheduled to commence on Friday 20th February 2026 and are expected to be completed by 1st April 2026, subject to weather and operational conditions. During this period, Brightlingsea Marina will be closed, and no access will be permitted either by water or on foot for the duration of the works. Van Oord will be operating two vessels, Baldr and Havik, both of which will maintain a listening watch and be contactable on VHF Channel 68 at all times. Dredging operations will be conducted during ebb tides only and will take place during daylight hours and at night. The accompanying images illustrate: The outer marina dredging perimeter and pipe placement The full dredge area Identification images of vessels Havik and Baldr All mariners are requested to exercise caution when navigating in the vicinity of the works and to comply with any instructions issued by Brightlingsea Harbour staff or the dredging contractor. For further information, please contact Brightlingsea Harbour Office on 01206 302200 or mail@brightlingseaharbour.org |
Brightlingsea Harbour Commissioners Notices to Mariners dated 16th February, 2026
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Week 09 |
HYTHE QUAY MALDON - DURATION: 12 WEEKS (END OF MAY 2026) PONTOON REMOVAL: THE VISITOR PONTOON IS TO BE REMOVED FOR ESSENTIAL MAINTENANCE AT THE BEGINNING OF MARCH 2026 AND WILL NOT BE REINSTALLED UNTIL MAY. NO EXACT DATE CAN BE GIVEN AS THE SCALE OF THE WORK TO BE UNDERTAKEN WILL NOT BE KNOWN UNTIL THE PONTOON HAS BEEN ASSESSED. DREDGING OPERATIONS: WILL COMMENCE DURING THE LATTER PART OF MARCH FOR A PERIOD OF EIGHT WEEKS, POSSIBLY LONGER SUBJECT TO TIDE AND WEATHER CONDITIONS. VISITING VESSELS ARE ASKED TO MAKE ALTERNATIVE ARRANGEMENTS AND NOT USE HYTHE QUAY DURING THIS TIME. A FURTHER NOTICE TO MARINERS MAY BE ISSUED BY MALDON DISTRICT COUNCIL IF THESE WORKS ARE LIKELY TO OVERRUN. FURTHER INFORMATION MAY BE OBTAINED BY CONTACTING MALDON DISTRICT COUNCIL AT river.bailiff@maldon.gov.uk |
Maldon District Council Notices to Mariners dated 2nd March, 2026 |
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Week 09 |
Sizewell Harbour - Mariners are advised that on or about 19th February works will commence upon the installation of three subseabed pipelines within Sizewell C Harbour. The works will comprise the sequential boring and lining of three tunnels – • Combined Drainage Outfall – to discharge to sea treated wastewater from the main construction site. • Desalination plant intake – sea water intake to desalination plant • Desalination plant outfall – discharge of surplus sea water back to sea Vessels engaged in these works include JUB NP497, Multicat Paul D and C- The construction area will be contained within SZC Marine Construction Zone as per the coordinates below and is demarcated with two yellow special marks Fl Y 5s. 52° 12.9171′ N 001° 37.4473′ E 52° 13.4574′ N 001° 37.5149′ E 52° 13.4655′ N 001° 38.2073′ E 52° 12.9263′ N 001° 38.2270′ E Vessels will transit frequently through the harbour to and from the MCZ and the floating swing mooring –mariners are requested to navigate with extra vigilance during these works. Towards the end of the works the pipe pull- All vessels should maintain 500m exclusion zone at all times when passing the Jack- Mariners are requested to exercise additional vigilance and maintain an effective lookout when transiting the harbour during this period of raised marine activity. All vessels engaged in this operation will abide by and display shapes and lights required by the COLREGS. Vessels will monitor VHF Channels 12 & 16. |
Sizewell C Notice to Mariners No 11 of 2026 |
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Week 08 |
River Thames - This Notice supersedes and replaces L61- On or around 3rd February 2026, contractors working for London Gateway Port will move on to the next phase of piling works at Berth 5, with marine piling operations due to commence soon after. With the 430 m Berth 5 extension now complete, piling works will focus on a further 75 m extension into the area that will form Berth 6. This activity will construct a new section of retaining wall to support the continued westward development of the port. A bubble curtain will be deployed to mitigate noise from the piling operations. The works will utilise the Neptune 585 Eurobarge, a 75 m x 25 m floating barge equipped with a 750 t crawler crane to support lifting operations. A second flat- A 75 m exclusion zone is to be maintained from vessels manoeuvring on and off Berth 4 by delivery and support barges. During manoeuvring, assisting tugs are permitted to enter the 75 m exclusion zone. Once a vessel is suitably moored on Berth 4, delivery and support barges may operate within 75 m of the vessel’s final berthed position if required. Works are expected to continue until August 2026. All vessels involved in the works will maintain a continuous listening watch on VHF Channel 68. For the latest information, contact London VTS on VHF Channel 68. |
Port of London Authority Notices to Mariners Nos L6 of 2026
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Week 08 |
River Thames - Mariners are advised that, on or about 07th February 2026, contractors instructed by Port of Tilbury London Ltd will commence dredging operations at Tilbury Lock Entrance, Tilbury Grain Terminal Main Berth and Tilbury 2 CMAT. The general location of the dredging is indicated by the red boxes on the chartlets. These dredging operations will be carried out by the water injection dredging method by vessel MAAS and will be conducted during ebb tides only. An alternate dredging vessel may be substituted if necessary; in this case, details will be broadcast by London VTS. The areas to be dredged includes Tilbury Lock bellmouth / entrance and the respective berth boxes of the other locations. The dredging is expected to be complete no later than 01st March 2026. Requirements to proceed with caution or at slow speed will be made in accordance with the procedures set out in the Port of London Authority’s Port Information Guide, under ‘Speed Reductions’ with the International Code Flags ‘Romeo Yankee’ displayed. The display of these signals will be in addition to any lights or shapes required under local regulations and the International Regulations for Preventing Collisions at Sea. Further details will be broadcast as appropriate by London VTS on VHF Channel 68. |
Port of London Authority Notices to Mariners Nos L7 of 2026
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Week 08 |
Surveyed Depths – Harwich Harbour Mariners are advised of the latest hydrographic surveys showing depths in Harwich Harbour which are published as follows: Charts & Surveys - The controlling depth for deep draught vessels navigating within the harbour area should currently be taken as 15.1m below chart datum, plus height of tide. Significant depths below chart datum (not including inside berth boxes) are: • 15.1m - • 15.3m - • 15.2m - Contact Harwich VTS or Haven Pilots for further information regarding tidal windows.
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Harwich Haven Authority Notices to Mariners No 13 of 2026 |
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Week 08 |
Rivers Orwell and Stour - Mariners are advised that scientific equipment marked by lit yellow special mark buoys has been temporarily deployed in the following locations:
BM ADCP2a 51° 57.172’ N 001° 10.992’ E Fl (5) Y 20s BM ADCP3a 51° 57.007’ N 001° 18.003’ E Fl (2) Y 6s BM ADCP4 51° 54.542’ N 001° 19.367’ E Fl (5) Y 20s The equipment / buoys are expected to remain in position for around 30 days, until approximately 26 - |
Harwich Haven Authority Notices to Mariners No 08 of 2026 |
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Week 09 |
Great Yarmouth - MARINERS ARE ADVISED that the most recent surveys of the Great Yarmouth River Port have identified an obstruction in position 52°36’.0581N 001°43.5561 which is within the navigable channel adjacent to berth 28, approximately 30 metres off the quay wall. The obstruction protrudes around 1.4m above the surrounding riverbed, giving a shoalest depth of 4.8m at Chart Datum. Mariners are advised to consider this information when passage planning. Latest charts can be found at https://www.peelports.com/marine/our- Please contact the Great Yarmouth Harbour Office with any questions;
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Great Yarmouth (Peel Ports) Notices to Mariners No 7 of 2026 Extract of GYPC chart GYA001_8_2026_001 showing newly identified obstruction
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Week 09 |
Sizewll Harbour - Mariners are advised that works to construct the Marine Bulk Import Facility (MBIF) are scheduled to commence within the Sizewell C harbour on or around 9th February 2026 and will continue for approximately 6 months. The MBIF is being built in Sizewell C harbour to accommodate deliveries by sea during Sizewell C construction phase. The works will comprise the construction of an approach trestle connecting the jetty head and vessel berth with the terrestrial main build area. The seaward facing jetty head will consist of a loading/discharge platform onto which vessels will deliver the aggregate. The construction area will be contained within SZC Marine Construction Zone as per the coordinates below and is demarcated with two yellow special marks Fl Y 5s. 52° 12.9171′ N 001° 37.4473′ E 52° 13.4574′ N 001° 37.5149′ E 52° 13.4655′ N 001° 38.2073′ E 52° 12.9263′ N 001° 38.2270′ E A significant number of construction vessels comprising JUBs, CTVs, dredgers, tugs, flat top barges, multicats and other support vessels will be engaged on this project (see Marine Plant below). All activities will take place within the newly established Marine Construction Zone (MCZ), apart from those vessels transiting between the works and the floating swing mooring situated at the northern end of the harbour. Mariners are requested to exercise additional vigilance and maintain an effective lookout when transiting the harbour during this period of raised marine activity. All vessels engaged in this operation will abide by and display shapes and lights required by the COLREGS. Vessels will monitor VHF Channels 12 & 16. |
Sizewell C Notice to Mariners No 8 of 2026 Refer to image at Sizewell NtM 7 in Week 7 |
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Week 07 |
River Thames - Mariners are advised that the works on the Fobbing flood defence barrier, previously notified in PLA Notice to Mariners L78- The Fobbing flood defence barrier consists of 4 moveable gates, each 9m wide. These works will be undertaken on all the 4 gates, but only working on 1 gate at a time. Whenever a Gate is undergoing works, that Gate will be lowered into the defence position, marked with yellow & black tape and illuminated at night. The barrier structure fixed warning beacons may also operate. During these Works, the Fobbing Barrier remains open to navigation via the remaining Gate spans. Mariners are advised to proceed with caution at a safe speed, keeping clear of the lowered gate and keeping a sharp lookout for other craft and for workers and equipment involved in these works and being aware of the available depth of water taking into consideration the height of tide. Personnel are expected to work 0700–1800, Monday to Friday only and these works are planned to be completed no later than 1st May 2026. Further details may be obtained from London VTS on VHF channel 68 or telephone 01474 562215. |
Port of London Authority Notices to Mariners Nos L5 of 2026
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Week 07 |
River Thames - Mariners are advised that, on or around 9th February 2026, contractors working on behalf of Tideway Tunnel will be carrying out fender replacement and repair works at the King Edward Memorial Park site. Works will involve the use of a spudded barge and crane as well as divers and will continue for approximately 3 weeks. The chartlet shows the location of the works on the river (in red): During these works the spudded GPS 601 barge will be located at the front of the site and lifting works will be carried out using cranes mounted on the barge and landside. Tugs GRS ENDURANCE, ESSEX, HANS and SUFFOLK will be used to manoeuvre the barge. All vessels involved in the works will maintain a listening watch on VHF channel 14. Requests for a Speed Reduction or “Proceed at slow speed” will be made by London VTS on VHF Ch.14, in accordance with the Port of London Authority’s Port Information Guide, under ‘Speed Reductions’, and international code flags ‘Romeo Yankee (RY)’ will be displayed accordingly. In addition, when diving is taking place, contractors engaged in diving operations will display the following International Code Flags: By day, International Code Flags ‘Romeo Yankee (RY)’, ‘Alpha (A)’ and a red flag near the diver’s point of entry into the water. By night, illuminated rigid replicas of the International Code Flags ‘Romeo Yankee (RY)’ and ‘Alpha (A)’. Passing vessels are reminded to be mindful of the nature of the works, including diving operations and the use of cranes, and to be aware of vessels proceeding to and from the works. Further details will be broadcast by London VTS on VHF Channel 14. |
Port of London Authority Notices to Mariners Nos M9 of 2026
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Week 07 |
Surveyed Depths – Mistley Quay and approaches Mariners are advised of the latest hydrographic surveys showing depths at Mistley Quay and approaches (upper River Stour) which are published as follows: Charts & Surveys - The controlling depth for deep draught vessels navigating within this area should currently be taken as 0.7m below chart datum, plus height of tide. Contact Harwich VTS or Haven Pilots for further information regarding tidal windows. |
Harwich Haven Authority Notices to Mariners No 09 of 2026 |
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Week 07 |
River Medway – Saltpan Reach - NOTICE IS HEREBY GIVEN … General maintenance works will be carried out on the Grain LNG Access Pontoon, located between LNG Jetties 10 and 8, work will commence this Thursday, 29th January 2026. Personnel will be working at the waterline, and the works are expected to take approximately 4–6 weeks to complete. The safety boat “Westbourne” will be in attendance throughout and will maintain a listening watch on VHF Channel 74. All commercial and leisure vessels should pass with caution, adhere to the LNG exclusion zones, and minimise their speed & wash when transiting the area. Admiralty Chart 1834 refers Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS” or telephone 0151 949 6148 or 0151 949 6650. |
Medway (Peel Ports) Notices to Mariners No 7 of 2026
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Week 07 |
Yellow Special Mark at the entrance to Burnham Yacht Harbour NAVIGATION Mariners are advised that the Yellow Special Mark at the entrance to Burnham Yacht Harbour in approximate position: 51°37.499 N, 000°48.238 E is temporarily off station Inner Whitaker Lighted Buoy – River Crouch NAVIGATION Mariners are advised that the Inner Whitaker Lighted Buoy in approximate position: 51°40.757 N, 01°08.400 E is unlit. |
Crouch Harbour Authority Notices to Mariners Nos 3 and 2 of 2026 |
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Week 07 |
Sizewell Harbour - Mariners are advised to note that the swing mooring referred to in Notice to Mariners No 5 of 2026 has now been installed. The confirmed position of the swing mooring is 52 13.8’N 001 38.9’E The mooring will be utilised throughout upcoming construction works within Sizewell C Harbour and will moor a variety of vessels throughout the works until further notice. The buoy is lit by a light Fl Y 3s. A short floating mooring tail is attached to the buoy. Vessels may be transferred to the mooring buoy without notice accordingly mariners are advised to navigate this area with caution and be alert to vessel movements. |
Sizewell C Notice to Mariners No 6 of 2026
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Week 07 |
Sizewll Harbour - NOTICE IS HEREBY GIVEN: that a Marine Construction Zone will be established within Sizewell C Harbour with effect from 1st February 2026. Marine Construction Zone A Marine Construction Zone (MCZ) is being established to accommodate a number of marine construction and associated service vessels for the duration of a period of increased construction activities to ensure the safety of mariners during this period. All vessels other than those engaged in the construction works are excluded from this area until the MCZ is removed. The MCZ will be implemented for an initial 12- Latitude Longitude 52° 12.9171′ N 001° 37.4473′ E 52° 13.4574′ N 001° 37.5149′ E 52° 13.4655′ N 001° 38.2073′ E 52° 12.9263′ N 001° 38.2270′ E The seaward extents of the MCZ are marked by two yellow special mark buoys, light characteristics Fl Y 5s which are positioned at the following coordinates. Latitude Longitude 52° 13.4655′ N 001° 38.2073′ E 52° 12.9263′ N 001° 38.2270′ E The MCZ is contained within three lines (shown in red on the above Chartlet); The eastern edge of the area is delineated by a north/south line joining the two east west lines. |
Sizewell C Notice to Mariners No 7 of 2026
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Week 06 |
River Medway – Upnor Reach – Royal Engineers Training Manoeuvres. Notice is hereby given that a formal agreement has been reached between Port of Sheerness Ltd. (Peel Ports) and 1 Royal School of Military Engineers (1 RSME Regt) Boat School at Upnor which will establish a set of procedures in relation to their manoeuvres on the River Medway. 1 RSME Regt. has operated it’s boat school from Upnor Hard for many years, however, this agreement now aims to improve communications with other river users and formalise a working agreement to cover their activities. The points below form the basis of the agreement: 1RSME will endeavour to abide by the speed limits as far as practicable and at all times be respectful to all other river users. PoSL will permit 1RSME to exceed the speed restriction of 6 knots within a defined area of Upnor Reach. In the bounds of the below: A line from Upnor Castle due East until the eastern bank of the river. A line from the most northerly point of Thunderbolt pier due west to the western bank of the river. 1RSME will fly a red flag on a mast visible to river users when conducting training operations within Upnor Reach. Once the new jetty at Upnor has been commissioned, this flag will be positioned at the jetty head. 1 RSME Regt is to inform PoSL as soon as possible prior to delivering a training course so that PoSL is aware of upcoming training. PoSL will issue a Notice to Mariners and keep it updated when it receives the above exercises' dates. The notice will explain the agreement and publish the dates to all river users. 1RSME will contact Medway VTS (via VHF or Telephone) at the beginning and end of the training day. This will detail the area of operations that day, the number of vessels to be used and if speed restrictions will be exceeded. Medway VTS will notify any commercial traffic transiting the area of operation. Open dialogue will be maintained from both parties to investigate and report incidents. PoSL will work with UK Hydrographic office to have a designated area marked on the chart for military training area All craft transiting Upnor Reach when a red flag is flying from the Royal Engineers jetty head should do so with caution and be aware of the military training manoeuvres. Admiralty Chart No. 1835 refers. Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS” or telephone 0151 949 6148 (Recorded Line). |
Medway (Peel Ports) Notices to Mariners No SNtM 10
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Week 06 |
River Medway – Upnor Reach - NOTICE IS HEREBY GIVEN … Following SNtoM No.10 whereby a formal agreement between the Royal School of Military Engineers Boat School and the Port of Sheerness was reached. Link to SNtoM 10: https://www.peelports.com/media/sdfnvzgy/medway- As part of the agreement, 1RSME have provided us with their latest training dates. Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS” or telephone 0151 949 6148 or 0151 949 6650. |
Medway (Peel Ports) Notices to Mariners No 5 of 2026
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Week 06 |
IPSWICH -
Mariners are advised that on:- Wednesday 28th February 2026 1800 – 1930 The Ipswich lock will be temporarily closed to river traffic. This is to facilitate High voltage electrical upgrade works on the port estate. Mariners requiring any further information should contact ONS on VHF CH68. |
Ipswich (ABP Ports) Notices to Mariners No 3 of 2026 |
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Week 05 |
Sea Reach to Thames Estuary: Dredging Operations Mariners are advised that commencing on 19th January 2026, dredging and associated survey operations will be carried out within the Port of London and approaches. These works are expected to be completed on or around 31st March 2026. The various dredging and survey areas are listed below and indicated by red boxes on the chartlets: London Gateway Berths 1- London Gateway Manoeuvring Area Sea Reach West Oaze Knock John Channel The Sunk The licensed dumping (spoil) grounds for the dredging operations are located at: South Falls Inner Gabbard North Edinburgh Channel Note: the locations marked on the chartlets are for indicative purposes only. The vessels involved in these operations include: VALKYRIE IV Survey Vessel 11.3m 19th January – 31st March BREYDEL Trailing Suction Hopper Dredger 125.5m 23rd January – 31st March DHAMRA Water Injection Dredger 30.9m 18 February – 31st March All vessels involved in dredging and survey operations will display the relevant signals in accordance with the International Regulations for Preventing Collisions at Sea. All vessels will be maintaining a listening watch on VHF Ch. 68 and VHF Ch. 69 and will be in direct contact with London VTS. Mariners are urged to exercise caution and remain vigilant when navigating in the vicinity of these vessels. For more information contact London VTS on the relevant VHF channel for the area or by telephone on 01474 562 215. |
Port of London Authority Notices to Mariners Nos L4 of 2026
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Week 05 |
River Thames - Mariners are advised that, on or about Tuesday, 20th January, contractors instructed by the operator of Coldharbour Jetty will be undertaking arrestor pile replacement works. These works are expected to underway for approximately 7 weeks, with operations occurring between the hours of 0700hrs and 1800hrs. The chartlet shows the general location of the works, indicated by the red box: Works will be undertaken from flat top pontoons “Sea Voyager” & “GPS601”, with the addition of various support craft, including Tugs and Workboats. Only one flat pontoon will be present on site at any given time, moored on station on the riverside of Coldharbour Jetty. The works will include, but may not be limited to, diving operations, heavy lifts and working at height in MEWPs. During these works, any requirement to proceed with caution or at slow speed will be made in accordance with the procedure set out in the Port of London Authority’s Port Information Guide, under ‘London VTS’, ‘Section 4’. International Code Flags ROMEO YANKEE,. The display of these signal flags will be in addition to any signals, lights or shapes specified by the International Regulations for Preventing Collisions at sea and local regulations. London VTS will broadcast further information, as required, on VHF Channel 14. |
Port of London Authority Notices to Mariners Nos L3 of 2026
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Week 05 |
River Thames - Mariners are advised that, on or about Monday 26th January 2026, contractors instructed by the London Port Health Authority will commence repair works to Port Health Pier. These works will include lifting operations involving a crane barge and personnel working on the waterline. Crane barge HAVEN SEAFORTH and Safety Boats KGII and KING’S REACH are expected to be in attendance at these works. Additional tugs, workboats and safety boats may also attend on these works from time to time. The location of Port Health Pier is indicated by the red markings on the chart extract. These works are expected to be complete within approximately 6 weeks of commencement, with operatives expected to work 0800 – 1700, Monday to Friday. Requirements to proceed with caution or at slow speed will be made in accordance with the procedures set out in the Port of London Authority’s Port Information Guide, under ‘Speed Reductions’ with the International Code Flags ‘Romeo Yankee’, displayed. The display of these signals will be in addition to any lights or shapes required under local regulations and the International Regulations for Preventing Collisions at Sea. Further details will be broadcast as appropriate by London VTS on VHF channel 68. |
Port of London Authority Notices to Mariners Nos L2 of 2026
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Week 05 |
Woolwich Reach - The Thames Flood Barrier will be closed once a month for test purposes, in accordance with a programme issued for a period of six months, commencing 01st May 2026. Listed below are the times between which the Thames Barrier will be closed to navigation for test purposes. During these periods’ navigation in the Thames Barrier Control Zone, between Margaretness and Blackwall Point, will be restricted and any movements in this area will require permission from London VTS. PROGRAMME OF CLOSURES: Wednesday 6th May 2026 09:45 to 12:15 Thursday 4th June 2026 09:30 to 12:00 Monday 6th July 2026 11:15 to 13:45 Monday 3rd August 2026 10:30 to 13:00 Monday 14th September 2026 09:45 to 12:15 Sunday 11th October 2026 08:05 to 18:05 All times are approximate The closures will be confirmed and promulgated by London VTS from 24 hours in advance of the operation by VHF radio on routine river broadcasts. From the start of each closing procedure until completion of the opening procedure vessels will be prohibited from transiting the Thames Barrier. Most closures are for approximately 2½ hours over the respective low waters. No vessel is to pass Margaretness inward bound or Blackwall Point outward bound once a Thames Barrier closure has commenced unless authorised by London VTS. GATE CLOSURES: In addition to the full Thames Barrier closures there will be frequent closures of individual gates for maintenance and training purposes, subject to a programme issued by the Environment Agency. The closure of individual gates will change the spans available for navigation. Information regarding these gate closures will be promulgated by London VTS on VHF Channel 14 routine river broadcasts. A copy of the six- During each full Thames Barrier or individual gate closure(s), illuminated red crosses will be displayed on both sides of the gate(s) indicating that the gate(s) are closed to navigation: |
Port of London Authority Notices to Mariners Nos P2 of 2026 NOTES: 1. Any additional Thames Barrier closures for test purposes will be promulgated by separate notices to mariners issued 28 days in advance of such closures. 2. The Barking barrier will be closed at the same time as the Thames Barrier. |
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Week 05 |
Works on Felixstowe Wave Buoy
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Harwich Haven Authority Notices to Mariners No 05 of 2026 Note that the Wave Buoy is adjacent to Felixstowe Ledge SHB. |
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Week 04 |
Harwich Haven - Mariners are advised that the Cathy Anne will be continuing with water injection dredging operations at Mistley and in the upper River Stour on or around the following dates: • 14 January 2026 • 14 February 2026 • 14 March 2026 • 13 April 2026 • 13 May 2026 • 12 June 2026 • 11 July 2026 • 10 August 2026 • 21 September 2026 • 21 October 2026 • 21 November 2026 • 14 December 2026
This notice replaces local notice to mariners No. 67 of 2025, which is now withdrawn. |
Harwich Haven Authority Notices to Mariners No 01 of 2026 |
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Week 04 |
Centre Span Lights Orwell Bridge
Mariners are advised that the Centre span lights on the Orwell Bridge are defective. These lights are maintained by the highway’s agency. After initial defect inspections these works are more complex and will require further works to rectify. ABP Ipswich will actively cancel this notice when the defect is rectified. |
Port of Ipswich (ABP Ports) Notices to Mariners No 01 of 2026 |
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Week 04 |
2026 Kings Lynn Fisher Fleet Flushes
Mariners are advised that fisher fleet flushes are scheduled for the following dates in 2025. Flushes will take place 3 hours after AM High Water for approximately 4 hours. Sunday 1st – Friday 6th February Monday 2nd March- Wednesday 1st April- Friday 1st May- Sunday 14th June- Monday 13th July – Monday 20th July Wednesday 12th August – Tuesday 18th August Thursday 10th September- Thursday 8th October – Wednesday 14th October Monday 23rd November – Sunday 29th November Wednesday 23rd December- All Masters of Fishing vessels in the Fleet are instructed to ensure that adequate lines are used as normal during spring flush tides. Flushes will be carried out with an approx. dock level of 7.0M. |
Port of Kings Lynn (ABP Ports) Notices to Mariners No 01 of 2026 |
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Week 04 |
Approaches to Kings Lynn - Mariners are advised that the below changes in the approach channel buoyage were completed on 08.01.26. a) No 13 Light buoy new location - b) No 16 Light buoy new location- c) No 17 Light buoy new location - c) No 19 Light buoy new location - |
KING'S LYNN CONSERVANCY BOARD Notice to Mariners No. 02 of 2026 |
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Week 04 |
Ramsgate Outer Harbour - Mariners are advised that, following recent strong Northerly storms, the accuracy and reliability of soundings at the Port Entrance are considered unreliable. These soundings were previously derived from the Hydrographic Survey of October 25. Vessels with a deep draught, specifically those drawing over 3.0 meters, should navigate the Port Entrance with particular caution, especially during periods of Low Water. To address this, the Port Authority is arranging an updated hydrographic survey for the affected area. Furthermore, dredging operations are being scheduled for both the Harbour and the Port Entrance to restore and maintain advertised depths. Further Notice will be issued when the new survey data is available and when dredging operations are due to commence. |
Ramsgate Royal Harbour Notices to Mariners No 04 of 2026 |
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Week 04 |
Dover Harbour - Mariners are advised that from January 19th to March 13th, pontoon replacement works will take place in the Jet Foil Basin. Mariners are requested to keep well clear, taking instruction from Dover VTS on VHF Ch 74. |
Dover Harbour Board Notices to Mariners No 01 of 2026
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Week 03 |
River Thames - This Notice supersedes and replaces M130- Tideway Tunnel contractors are continuing with the deconstruction of the Chambers Wharf site. To support these works, from around the 12th January 2026, works will increase on site to include additional dredge set barges and further diving operations. Remaining works are expected to continue for 16 weeks. Indicative barge layouts, and the approximate area of works in the river (in red), are shown on the chartlet. Works involve the use of the spudded GPS 601 barge, the SeaVoyager barge and two 500t hopper barges. Divers will enter the water from the GPS 601 barge to carry out pile cutting operations. Lifting of sheet piles, dredging and excavation of fill material operations will also be carried out. Hopper barges may protrude beyond the works area, shown in magenta on PLA charts. This will only be during daylight hours, never overnight, and barges will not protrude into the navigation channel. The GPS 601 and SeaVoyager will alternate positions at a rate of no more than twice in a month. Barges will be manoeuvred and divers taken to/from site using the tugs SWS ENDURANCE, ESSEX, HANS and SUFFOLK. The vessels and dive team will maintain a listening watch on VHF CH 14. When diving is taking place, contractors engaged in diving operations will display the following International Code Flags: By day, International Code Flags ‘Romeo Yankee (RY)’, ‘Alpha (A)’ and a red flag near the diver’s point of entry into the water. By night, illuminated rigid replicas of the International Code Flags ‘Romeo Yankee (RY)’ and ‘Alpha (A)’. Any requirements to proceed with caution or at slow speed, will be made in accordance with the procedures set out in the Port of London Authority’s Port Information Guide, under ‘Speed Reductions’ with the International Code Flags ‘Romeo Yankee’ displayed. The display of these signals will be in addition to any lights or shapes required under local regulations and the International Regulations for Preventing Collisions at Sea. Passing vessels are reminded to be mindful of the nature of the works, including diving operations and the use of cranes, and to be aware of vessels proceeding to and from the works. The inner part of the cofferdam has now been removed leaving the foreshore exposed at low water. All river users are reminded that this is an active works site with dangers which may not be immediately visible and entry is prohibited at all times. Barriers have been installed along the foreshore and will be buoyed at high water. Mariners in smaller craft are also reminded not to travel between the cofferdam under deconstruction and the river wall, this remains a work site with potential hidden dangers below the waterline. All traffic must pass to the north of the site keeping a safe distance off the working vessels. All works vessels will maintain a listening watch of London VTS on VHF Channel 14. |
Port of London Authority Notices to Mariners Nos M1 of 2026
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Week 03 |
River Medway – Long Reach - NOTICE IS HEREBY GIVEN that a sunken vessel has been reported adjacent to Kingsnorth Jetty but inshore from the jetty head. The boat is visible at all states of the tide and will shortly be marked with a pellet buoy for visibility . The obstruction currently lies in the approximate location shown below. A cancellation to this notice will be published if and when the craft is recovered. Approximate position of the sunken vessel - All vessels should keep clear of the area until the obstruction is removed. Admiralty Chart 1835 Refers. |
Medway (Peel Ports) Notices to Mariners No 2 of 2026
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Week 03 |
Ramsgate Harbour - Mariners are advised a vessel is aground on the rock revetment to the North of Berth 2. Mariners operating in the vicinity of the port turning circle should maintain a proper lookout for potential debris or other navigational hazards |
Ramsgate Royal Harbour Notices to Mariners No 15 of 2025 |
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Week 03 |
Ramsgate Harbour - Mariners are advised of possible seabed changes in the vicinity of the Quern Bank, South West of Ramsgate Royal Harbour. Concerns have been raised regarding the current depth and extent of the Quern Bank, particularly near the West Quern Buoy in position: 51°18.98’N, 001°25.39’E There is reason to believe that sediment movement may have resulted in a reduction in charted depths or a westward shift of the Quern Bank. Mariners are reminded of NtM 18 ‘2024 of similar concerns relating to the Cross Ledge Bank, located just south of the Quern. The UK Hydrographic have been informed. Mariners are advised to: Exercise increased caution when navigating near the West Quern Buoy and surrounding shoal areas. Allow for greater under keel clearance, particularly at lower tidal states. Keep a safe distance from charted banks and monitor echo sounders where possible. Remain alert for further updates via local Notices to Mariners. |
Ramsgate Royal Harbour Notices to Mariners No 12 of 2025 |
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Week 02 |
Dover Harbour - Please be aware of the latest Marina Survey Chart that has now been published and uploaded onto the Ports community Portal for further reference Click on the Image to download as a pdf. |
Dover Harbour Board Notices to Mariners No 44 of 2025
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Week 01 |
Suffolk Yacht Harbour Dredging
Mariners are advised that Dredging in the entrance to the Suffolk Yacht Harbour will take place between: - Saturday 20th December 2025 and Tuesday 31st March 2026 This work is maintenance dredging to the entrance channel and within the marina. This work is being undertaken by a cutting suction dredger Muddy Boots 2 and Plough Tug Little Mo The vessels will maintain a listening watch on VHF CH68. |
Ipswich (ABP Ports) Notices to Mariners No 21 of 2025 |
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Week 01 |
River Crouch - Please be advised that Essex Marina will be undertaking Maintenance Dredging Operations in the approach to and within Essex Marina, Wallasea Island, Essex, starting w/c 5th January 2026. Dredging Operations will be carried out by Tug PUNISHER who will maintain a listening watch on VHF Channels 16 and 11. Caution should be taken when entering and leaving the Marina whilst Dredging Operations are in progress. For additional information please contact: Essex Marina Tel 01702 258531 |
Crouch Harbour Authority Notices to Mariners No 29 of 2025 |
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Week 01 |
The Wash Ports – River Nene - TEMPORARY MARKER BUOYS – RIVER NENE APPROACHES Mariners are advised of 11 temporary unlit marker buoys which are being laid commencing on the 12th December 2025 in a Northerly direction from between the No 9 buoy (Starboard Hand Mark) and No7 Buoy (Starboard Hand Mark). The buoys are being laid to assist in surveying the area and their positions may vary during the survey work. Buoy / Beacon Name Colour Type Light Latitude Longitude
Buoy None Green None 52o52.430' N 000o13.13.167' E Buoy None Red None 52o51.999' N 000o13.13.398' E Buoy None Green None 52o51.975' N 000o13.13.356' E Buoy None Red None 52o51.714' N 000o13.13.403' E Buoy None Green None 52o51.710' N 000o13.13.336' E Buoy None Green None 52o51.538' N 000o13.13.346' E Buoy None Red None 52o51.533' N 000o13.13.407' E Buoy None Green None 52o51.323' N 000o13.13.271' E Buoy None Red None 52o51.312' N 000o13.13.336' E Buoy None Green None 52o51.169' N 000o13.13.130' E Buoy None Red None 52o51.145' N 000o13.13.201' E |
Port of Wisbech Harbour Authority Notice to Mariners No 009 of 2025 |
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SCROLL DOWN FOR 2025 NOTICES |
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Week 50 |
River Thames - Mariners are advised that on or around 1st December 2025, the collar barge currently located at ‘Waterloo Barge Tier’ will be permanently moved to a new location in the vicinity of Victoria Dock Entrance. This notice will remain in place until such time as adequate chart corrections have been promulgated. |
Port of London Authority Notices to Mariners Nos M148 of 2025
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Week 50 |
Blakeney Harbour - No. 1 starboard lateral marker is off station and ashore on Blakeney point. All vessels should avoid entering Blakeney Harbour until further notice, especially at night. If entering the following pilotage should be observed to navigate across the bar. From Fairway Marker follow a bearing of 175*T for 0.4NM until due east of starboard lateral marker #3. Then follow a bearing of 270*T towards starboard lateral marker #3. After this all- |
Blakeney Harbour Association, dated 25th November, 2025 |
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Week 48 |
Surveyed Depths – Harwich International Port and approaches – Update 2 Mariners are advised of the latest hydrographic surveys which are published as follows: Charts & Surveys - In the lower River Stour, the significant depths below chart datum (not including berths) are: • Within area dredged to 8m: minimum depth - • Within area dredged to 9m: minimum depth - For further information contact the Harbour Master Team at Harwich Haven Authority (+44 1255 243030). |
Harwich Haven Authority Notices to Mariners No 92 of 2025 |
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Week 48 |
Surveyed Depths – Halfpenny Pier, Harwich – Update 3 See hydrographic survey extract below for latest depths at Ha’penny Pier and approaches: |
Harwich Haven Authority Notices to Mariners No 91 of 2025
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Week 47 |
River Thames - Mariners are advised that an extended secondary channel in the Yantlet Channel has been established to the south of the Sea Reach Channel. This extension runs further west to Lower Hope Buoy and extends 0.7 cables from the southern extent of the main channel. This amendment will shortly be reflected on all PLA and Admiralty products. The minimum depth within the new secondary channel is 4.3 metres. Vessels that can safely navigate outside of the main channel are advised to do so to remain clear of vessels arriving, swinging, or departing London Gateway. |
Port of London Authority Notices to Mariners Nos L85 of 2025
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Week 46 |
River Thames - This Notice supersedes and replaces L35- Mariners are advised that, at the time of publishing this Notice, the works at Calor Gas Canvey terminal which were previously notified in PLA Notices to Mariners L78- Requirements to proceed with caution or at slow speed will be made in accordance with the procedures set out in the Port of London Authority’s Port Information Guide, with the International Code Flags ‘Romeo Yankee (RY)’, displayed. The display of these signals by a vessel will be in addition to any lights, shapes or signals required in accordance with the International Regulations for Preventing Collisions at Sea (IRPCS) and local regulations. Further details will be broadcast as needed by London VTS on VHF channels 68 & 69. |
Port of London Authority Notices to Mariners Nos L83 of 2025
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Week 45 |
Harwich Haven - Mariners are advised the survey boat GNH Crusader (Callsign: 2EQW) will be carrying out monthly survey operations in Harwich Harbour and the River Stour (see locations in diagram), starting on or around 22 October 2025, until the end of September 2026. |
Harwich Haven Authority Notices to Mariners No 84 of 2025
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Week 44 |
River Medway – Saltpan Reach - NOTICE IS HEREBY GIVEN that Installation of sacrificial anodes by divers and shot blasting/spraying is due to take place at Isle of Grain LNG Jetty 10. Work commenced in April 2025, is still underway, and is now expected to continue until the spring of 2026, the operation carries significant risk to men working on the waterline and below the surface. Craft involved will be the: ‘Avocet’ ‘Splitmoor ‘Storemoor’ ‘Liftmoor’ ‘Patrol’ ‘Westbourne’ Small rib tender ‘Retriever’ All craft will maintain a listening watch on VHF Channel 74 and display day signals for respective operations. All vessels passing Grain LNG Jetty 10 should navigate with caution, observe the LNG Jetty exclusion zone at all times and reduce speed and minimise wash accordingly. |
Medway (Peel Ports) Notices to Mariners No 11 of 2025 (Updated) |
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Week 44 |
Sizewell C Harbour - Mariners are advised that following an incident during survey operations an obstruction is present in position 52° 13’ 25”N 001° 40’ 58”. This obstruction, consisting of a cylindrical steel tube may extend up to 4m above the seabed. Mariners are advised that the obstruction referenced in Notice to Mariners #13 has now been marked with an orange dan buoy, positioned at: 52° 13’ 25.29576”N, 001° 40’ 58.58747”E The buoy is lit with a white flashing light (Fl 1.5s). Please note that the depth of water above the obstruction has not yet been confirmed. As a precaution, mariners are strongly advised to maintain a minimum clearance of 200 metres from the buoy until further notice. |
Sizewell Harbour Authority Notices to Mariners Nos 13 and 15 of 2025
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Week 44 |
Port of Wells Revised ATONs As of the 11th September 2025 please be aware of the recently revised Local Aids to Navigation for the Port of Wells. 1754 N019755 Wells Leading (West Cardinal) 52 59.773’N 000 50.399’E Lighted Buoy P1754 N08546 Wells Outer (Special Yellow) 52 59.483’N 000 50.464’E Lighted Buoy P1754 N08547 No.1 52 59.283’N 000 50.784’E Lighted Buoy P1754 N08548 No.2 52 59.157’N 000 50.850’E Lighted Buoy P1754 N08549 No.3 52 59.060’N 000 50.708’E Lighted Buoy P1754 N08550 No.4 52 59.019’N 000 50.735’E Lighted Buoy P1754 N08551 No.5 52 58.944’N 000 50.643’E Lighted Buoy P1754 N08552 No.6 52 58884’N 000 50.673’E Lighted Buoy P1754 N08553 No.7 52 58.883’N 000 50.626’E Lighted Buoy P1754 N08554 No.8 52 58.772’N 000 50.722’E Unlighted Buoy P1754 N08555 No.9 52 58.722’N 000 50.676’E Unlighted Buoy P1754 N08556 No.10 52 58.661’N 000 50.793’E Lighted Buoy P1754 N08557 No.11 52 58.611’N 000 50.773’E Lighted Buoy P1754 N08558 No.12 52 58.546’N 000 50.875’E Lighted Buoy P1754 N08559 No.13 52 58.457’N 000 50.992’E Lighted Buoy P1754 N08570 No.14 52 58.445’N 000 51.109’E Lighted Buoy P1754 N08565 No.15 52 58.391’N 000 51.164’E Unlighted Buoy P1754 N17975 AC2 52 58.391’N 000 51.164’E Lighted Buoy P1754 N08571 No.16 52 58.337’N 000 51.285’E Unlighted Buoy P1754 N17976 AC4 52 58.330’N 000 51.089’E Unlighted Buoy P1754 N08568 No.17 52 58.281’N 000 51.292’E Unlighted Buoy P1754 N08572 No.18 52 58.245’N 000 51.398’E Lighted Buoy P1754 N08574 No.19 52 58.202’N 000 51.396’E Lighted Buoy P1754 N08563 No.20 52 58.196’N 000 51.444’E Unlighted Buoy P1754 N08567 No.21 52 58.204’N 000 51.248’E Lighted Buoy P1754 N08573 No.22 52 58.186’N 000 51.238’E Unlighted Buoy P1754 N19987 No.23 52 58.165’N 000 51.161’E Lighted Buoy P1754 N08561 No.24 52 58.132’N 000 51.205’E Lighted Buoy P1754 N19766 No.25 52 58.087’N 000 51.088’E Unlighted Buoy P1754 No.26 52 58.003’N 000 51.061’E Lighted Buoy P1754 No.27 52 57.990’N 000 51.102’E Lighted Buoy P1754 No.28 52 57.829’N 000 51.074’E Lighted Buoy P1754 No.30 52 57.657’N 000 51.073’E Lighted Buoy P1754 No.29 52 57.552’N 000 51.054’E Lighted Buoy |
Port of Wells Notices to Mariners dated 13th September, 2025 A video of the entrance can be found at: https://www.portofwells.co.uk/navigation- |
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Week 44 |
Dover Harbour - Mariners are advised that top light of the two fixed red lights, on the Admiralty Pier Extension (CT2) is currently extinguished. |
Dover Harbour Board Notices to Mariners No 37 of 2025
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Week 43 |
Water Quality Sampling Activity by APEM Group Introduction Mariners are advised that APEM will be conducting water sampling activities over a 12-
Survey |
Notices to Mariners by APEM dated October, 2025
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Week 42 |
Sea Reach - Mariners are advised that, on or about 13th October 2025, contractors instructed by the Environment Agency are expected to re- The Fobbing flood defence barrier consists of 4 moveable gates, each 9m wide. These works will be undertaken on the 2 centre gates – Gate 2 and Gate 3 - Whenever a Gate is undergoing works, that Gate will be lowered into the defence position, marked with yellow & black tape and illuminated at night. The barrier structure fixed warning beacons may also operate. During these Works, the Fobbing Barrier remains open to navigation via the remaining Gate spans. Mariners are advised to proceed with caution at a safe speed, keeping clear of the lowered gate and keeping a sharp lookout for other craft and for workers and equipment involved in these works and being aware of the available depth of water taking into consideration the height of tide. Personnel are expected to work 0700–1800, Monday to Friday only and these works are planned to be completed no later than 31st January 2026. Further details may be obtained from London VTS on VHF channel 68 or telephone 01474 562215
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Port of London Authority Notices to Mariners Nos L78 of 2025
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Week 42 |
Upper Pool - This Notice supersedes and replaces M105- Tideway Tunnel contractors are continuing with the deconstruction of the Chambers Wharf site cofferdam. To support these works, on or around the 8th October 2025 diving operations will commence at the site. Dredging and excavation of material and lifting of piles using a crane barge and supply barges will continue to take place as before. Diving works are expected to continue for 3 months. The chartlet shows the area of the works on the river (in red) and approximate positions of barges. Works involve the use of the GPS 601 barge, spudded down on the outside of the sheet piles. Divers will enter the water from the barge to carry out cutting operations. Lifting, dredging and excavation operations will also be carried out from the same barge. A 500t barge will at times be moored alongside the GPS 601 to collect material and piles. The barge may protrude beyond the works area, shown in magenta on PLA charts. This will only be during daylight hours, never overnight, and barges will not protrude into the navigation channel. Approximately three barge movements are expected per week. Barges will be manoeuvred and divers taken to/from site using the tugs SWS ENDURANCE, ESSEX, HANS and SUFFOLK. The vessels and dive team will maintain a listening watch on VHF ch 14. When diving is taking place, contractors engaged in diving operations will display the following International Code Flags: By day, International Code Flags ‘Romeo Yankee (RY)’, ‘Alpha (A)’ and a red flag near the diver’s point of entry into the water. By night, illuminated rigid replicas of the International Code Flags ‘Romeo Yankee (RY)’ and ‘Alpha (A)’. Any requirements to proceed with caution or at slow speed, will be made in accordance with the procedures set out in the Port of London Authority’s Port Information Guide, under ‘London VTS’, ‘Section 4’ with the International Code Flags ‘Romeo Yankee’ displayed, which are illustrated.
The display of these signals will be in addition to any lights or shapes required under local regulations and the International Regulations for Preventing Collisions at Sea. Passing vessels are requested to be mindful of the nature of the works, including diving operations and the use of cranes, and to be aware of vessels proceeding to and from the works. The inner part of the cofferdam has now been removed leaving the foreshore exposed at low water. All river users are reminded that this is an active works site with dangers which may not be immediately visible and entry is prohibited at all times. Barriers have been installed along the foreshore and will be buoyed at high water. Mariners in smaller craft are also reminded not to travel between the cofferdam under deconstruction and the river wall, this remains a work site with potential hidden dangers below the waterline. All traffic must pass to the north of the site keeping a safe distance off the working vessels. All works vessels will maintain a listening watch of London VTS on VHF Channel 14. |
Port of London Authority Notices to Mariners Nos M130 of 2025
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Week 42 |
River Thames - Mariners are advised that the Barking Barrier will be closed once a month for test and training purposes on the following dates and times. These dates and times are additional dates to Thames Barrier (Nov 2025 to Apr 2026 Inc.), will affect all Gates at Barking and will involve training on all modes (Time Window for Training Operations: 4hrs Low Water Level Time Training Window (Barking, 2hrs either side of Low Water). Date Training Window North Woolwich LW Tuesday 11th November 2025 - Thursday 11th December 2025 - Monday 26th January 2026 - Monday 9th February 2026 - Thursday 26th March 2026 - Wednesday 22nd April 2026- The closures will be confirmed and promulgated by London VTS from 24 hours in advance of the operation by VHF radio on routine river broadcasts. From the start of each closing procedure until completion of the opening procedure vessels will be prohibited from transiting the Barking Barrier. Most closures are for approximately 4 hours over the respective low waters. |
Port of London Authority Notices to Mariners Nos M128 of 2025 |
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Week 42 |
Temporary Pipe Moorings – Parkeston Anchorage, River Stour Mariners are advised a temporary pipe mooring will be installed on the north side of the Parkeston Anchorage in the River Stour (see Figure 1) and utilised for the storage of floating pipes as follows: Around 25 – 26 September 2025 the MV C- From early October 2025 to March 2026 – 750m long pipes will be stored on the moorings. 2 x additional Special Mark Buoys (1YF3s) – ‘SW Marker Buoy’ and ‘SE Marker Buoy’ will be deployed along the south side of the mooring arrangement when the pipes are in storage.
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Harwich Haven Authority Notices to Mariners No 78 of 2025
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Week 42 |
River Medway – Esplanade Pier, Rochester - NOTICE IS HEREBY GIVEN that a sunken vessel currently lies alongside Esplanade Pier in Rochester. The boat, that sunk earlier in the summer, is still secured to the middle section of the pier but is not visible at any state of the tide. It has not been possible to mark the wreck effectively due to the rise and fall of the tide, however, signage warning river users of the wreck’s presence is currently being drafted. The wreck, which poses a risk to mariners, currently lies in the approximate location shown All vessels should keep clear of the area and not attempt to moor on the pier until further notice
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Medway (Peel Ports) Notices to Mariners No 41 of 2025
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Week 41 |
River Thames - Mariners are advised that the Dartford Creek Barrier will be closed once a month for test and training purposes on the following dates and times. Planned Activities for Training on all modes of operation has additional dates to Thames Barrier GMP86 (Nov 2025 to Apr 2026 Inc.). The time window for training operations is 0900 to 1300hrs (4hrs Training Window). The North Woolwich, Low Water Level Time is shown below. Monday 17th November 2025 0524hrs (GMT) Monday 19th January 2026 0811hrs (GMT) Wednesday 4th March 2026 0850hrs (GMT) Wednesday 1st April 2026 0839hrs (BST) Thursday 2nd April 2026 0916hrs (BST) The closures will be confirmed and promulgated by London VTS from 24 hours in advance of the operation by VHF radio on routine river broadcasts. From the start of each closing procedure until completion of the opening procedure vessels will be prohibited from transiting the Dartford Creek Barrier. Most closures are for approximately 4 hours over the respective low waters. |
Port of London Authority Notices to Mariners Nos L74 of 2025 |
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Week 41 |
Ipswich - Mariners are advised that the dates and times listed below Environment Agency will be conducting routine tests and maintenance to the Ipswich Tidal Barrier. During this period the river will be closed off between the Tidal Barrier and Stoke Bridge. Upon completion of the barrier closure, the barrier will be re- Date of Barrier closure Day Estimated closure timeframe 06th January 2026 Tuesday 10:00 – 14:00 (GMT) 27th January 2026 Tuesday 15:00 – 18:00 (GMT) 18th February 2026 Wednesday 09:00 – 13:00 (GMT) 04th March 2026 Wednesday 09:30 – 12:30 (GMT) 23rd March 2026 * Monday 07:00 – 13:00 (GMT) 24th March 2026 * Tuesday 07:30 – 13:30 (GMT) 07th April 2026 Tuesday 12:00 – 16:00 (BST) 20th April 2026 Monday 12:00 – 15:00 (BST) 05th May 2026 Tuesday 11:00 – 15:00 (BST) 19th May 2026 Tuesday 12:00 – 15:00 (BST) 03rd June 2026 Wednesday 11:00 – 15:00 (BST) 17th June 2026 Wednesday 11:30 – 14:30 (BST) |
Ipswich (ABP Ports) Notices to Mariners No 16 of 2025 Note(s): * indicates Barrier gate closures at low water. Closure timeframes listed are approximate and may change as a result of particular operational requirements or due to weather or tidal influences. Occasionally closures may be cancelled or rescheduled at short notice. We will endeavour to inform you such occurrences. The closure schedule provided does not include instances where the Ipswich Barrier is required to be closed for tidal flood defence purposes. |
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Week 32 |
River Thames - Barrier Closures For The Period 01 November 2025 to 30 April 2026 The Thames Flood Barrier will be closed once a month for test purposes, in accordance with a programme issued for a period of six months, commencing 01st November 2025. Listed below are the times between which the Thames Barrier will be closed to navigation for test purposes. During these periods’ navigation in the Thames Barrier Control Zone, between Margaretness and Blackwall Point, will be restricted and any movements in this area will require permission from London VTS. MONTH / YEAR DATE TIME January 2026 Wednesday 7th 0945 - February 2026 Thursday 5th 0930 - March 2026 Monday 9th 0950 - April 2026 Tuesday 7th 1051 - Note: All times are approximate The closures will be confirmed and promulgated by London VTS from 24 hours in advance of the operation by VHF radio on routine river broadcasts. From the start of each closing procedure until completion of the opening procedure vessels will be prohibited from transiting the Thames Barrier. Most closures are for approximately 2½ hours over the respective low waters. No vessel is to pass Margaretness inward bound or Blackwall Point outward bound once a Thames Barrier closure has commenced unless authorised by London VTS. GATE CLOSURES: In addition to the full Thames Barrier closures there will be frequent closures of individual gates for maintenance and training purposes, subject to a programme issued by the Environment Agency. The closure of individual gates will change the spans available for navigation. Information regarding these gate closures will be promulgated by London VTS on VHF Channel 14 routine river broadcasts. A copy of the six- During each full Thames Barrier or individual gate closure(s), illuminated red crosses will be displayed on both sides of the gate(s) indicating that the gate(s) are closed to navigation: |
Port of London Authority Notices to Mariners Nos P5 of 2025 NOTES: ANY ADDITIONAL THAMES BARRIER CLOSURES FOR TEST PURPOSES WILL BE PROMULGATED BY SEPARATE NOTICES TO MARINERS ISSUED 28 DAYS IN ADVANCE OF SUCH CLOSURES. THE BARKING BARRIER WILL BE CLOSED AT THE SAME TIME AS THE THAMES BARRIER. |
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Week 32 |
Dover Harbour - Mariners are advised that the West- It will be restored as soon as possible. |
Dover Harbour Board Notices to Mariners No 30 of 2025
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Week 31 |
EAST ANGLIA THREE - Summary: NKT will carry out nearshore intervention works in support of the installation on the East Anglia Three Export Cable in the Export Cable Corridor in the vicinity of Bawdsey approximately 800 metres from shore. Locations for works are identified in this document. Diving operations will be carried out onboard the vessel “Isle of Jura”, excavation and burial operation will be carried out by the “Abeko Server 2”, and Survey works & Crew Change operations will be conducted by “Seafast Don” All vessels are required to maintain a minimum of 500m separation distance from the Isle of Jura and Abeko Server 2 and pass at reduced speed. It is further requested that all vessels give the Seafast Don a wide berth and pass at reduced speed when the vessel is engaged in survey activities. Activity Description: Abeko Server 2 will be positioned at the HDD locations to begin seabed excavation for pit and trench creation and will carry out spoil management activities along the trench. The Abeko Server 2 will be manned 24 hours on site, with the Afon Alaw providing support for barge movements and towing as needed. Once a trench has been excavated, and cable laid into it, then the Abeko Server 2 will place spoil back into the trench to backfill and then return the seabed to previous levels. During operations, the Abeko Server 2 will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. The Isle of Jura will deploy a four- Diving operations will be conducted on the Isle of Jura, divers will be working at the HDD locations. Diving operations will involve exposing HDD exit points, preparing for cable installation, and sealing post cable installation. Following diving operations, the Isle of Jura will be equipped with a Controlled Flow Excavation (CFE) spread to perform remedial cable burial operation in the nearshore area, typically in sandy seabed location where excavation by Abeko Server was ineffective. There may be possibilities of nighttime diving operations. Safety messages will be transmitted on CH16 to notify the start and end of diving operations. During operations, the Isle of Jura will be anchored as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. The Alpha Diving flag and the appropriate lights will be displayed during diving operations. The Seafast Don will conduct multi- The Seafast Don will be responsible for daily crew transfer operations from the Port of Harwich to the vessels Isle of Jura, Abeko Server 2 and NKT Victoria throughout the duration of the works. All vessels will monitor VHF CH16 and VHF DSC CH70 continuously throughout. |
EAST ANGLIA THREE Notice to Mariners 042 of 2025
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Week 30 |
EAST ANGLIA THREE - 1.1. Summary: Please be advised that NKT will be deploying Guard Vessels along the East Anglia THREE Offshore Export Cable Corridor as detailed in Section 2.2 of this document for protection of the pre lay mattresses and to protect the cable bundle from the start of cable lay until the cable is adequately protected by means of trenching or rock placement. All Marine traffic is advised to exercise caution when the vessels are operating in the locations set out in section 2.1. 1.2. Activity Description: The primary purpose of the guard vessels is to protect the exposed cable along the East Anglia 3 Export Cable corridor by monitoring and issuing warnings to marine traffic operating within 6Nm of the construction area with a Closest Point of Approach (CPA) < 1.5Nm. More specifically, the focus will be on those vessels with potential to be engaging in bottom contact activities such as fishing and anchoring, as these activities pose a risk not only to the exposed cable bundle but also to the vessels themselves. The guard vessels will be clearly marked and display a highly visible "GUARD" sign on each side. Exchange of vessels on site will ensure the relevant section of cable is never left unguarded. In sections where cable protection has been completed, guard vessels will be released and sections will be opened up for fishing or use of other equipment with seabed intervention. This may not necessarily be in a sequential order from shoreside outwards. 1.3. Program Schedule: The vessels will operate 24/7, in all but extreme weather. Approximately 7 guard vessels will be used in the period from 20/05/2025 until completion. Durations at each location will depend on progress of the cable installation, trenching and rock placement operations. Not all the vessels are expected to be used concurrently. Any changes of the guard Vessels and completion of works will be notified via future Notice to Mariners. All vessels are required to monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operation. |
EAST ANGLIA THREE Wind Farm Notice to Mariners No 40 of 2025
The weekly report of operations include works nearshore (i.e. near Bawdsey) |
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Week 23 |
The Swale – Loden Hope – Washer Wharf - NOTICE IS HEREBY GIVEN that a pontoon which has been temporarily secured at Washer Wharf is restricting available sea room in the main navigable channel of Loden Hope. The pontoon measures approximately 72m x 30m and is laying alongside the wharf, due to it’s size, available sea room is compromised. Until an alternative location is found for the pontoon, it’s outboard extremities will be marked with an upstream and downstream fixed yellow light and fixed white light in the centre. All vessels passing Washer Wharf should navigate with caution. Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS” or telephone 0151 949 6148 or 0151 949 6650 (Recorded Lines) |
Medway (Peel Ports) Notices to Mariners No 17 of 2025
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Week 23 |
Dover Harbour - Change in Charted Depth – Western Entrance Wreck and Dive survey Mariners are advised that following a recent hydrographic survey conducted within the Port of Dover Western Entrance, a reduction in depth has been identified in the vicinity of the known wreck obstruction. Position: 51°06'51"N 1°19'43"E The latest survey data indicates a least depth over the obstruction of 7.1 metres below Chart Datum, which is a change from previously charted values. The area remains unmarked and should be navigated with caution. A dive inspection is planned to confirm the nature and extent of the obstruction and assess whether any changes to existing charted information or navigational warnings are required. During the dive inspection, which will take place on Wednesday 28th May 2025, the Western Entrance will be closed to ferry traffic and all mariners are to pass at a safe distance and slow speed taking instruction from VTS. Mariners are otherwise to navigate with caution in the area and ensure that their Under Keel Clearance (UKC) is calculated accordingly. Further updates will be issued as information becomes available . |
Dover Harbour Board, Notices to Mariners No 21 of 2025
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Week 21 |
East Coast of England -
Mariners are advised that a 7.5M LOA Cabin Cruiser has sunk on the western edge of the river bank at Wiggenhall St Peter and is a hazard to navigation. Sunken vessel Position 52°41'.527’N 000°22'.279’E. This is a danger to navigation and Mariners are to keep clear of this position. A recovery operation is being planned by the Harbour Authority. |
KING'S LYNN CONSERVANCY BOARD Notice to Mariners 7 of 2025
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Week 16 |
River Crouch - NAVIGATION Master’s and those at the helm of all vessels are requested to pass commercial shipping underway on the River Crouch and approaches at a safe distance and in particular when crossing ahead. Please be mindful of the following: Blind spots exist around larger vessels. The visual contact and presence of small craft may be lost as they approach the larger ship particularly from either directly ahead or astern. A minimum crossing distance of 100m should be allowed when passing ahead. A ship navigating even at slow speed is unable to stop immediately. A wide berth should also be given to any ship manoeuvring off the jetty at Baltic Wharf. Your cooperation in this matter is appreciated. |
Crouch Harbour Authority Notices to Mariners No 9 of 2025 |
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Week 15 |
River Crouch and River Roach - COURTEOUS NAVIGATION Mariners are reminded of their duty to not only abide by the 8- Moored craft. Vessels with tenders alongside. Small vulnerable craft. Please also consider and keep to a minimum your wake and wash when passing: Through Burnham Fairway. Essex Marina. North Fambridge swing moorings. All areas upriver of Brandy Hole. Paglesham swing moorings – River Roach. |
Crouch Harbour Authority Notices to Mariners No 7 of 2025 |
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Week 13 |
River Thames - This Safety Bulletin is a reminder of the correct procedures and professional etiquette expected when using VHF radio communication. As a vital tool for maritime safety and operational efficiency, the VHF radio must be used in strict compliance with international and national regulations, including the International Telecommunication Union (ITU) Radio Regulations, the International Maritime Organization (IMO) SOLAS Convention (Chapter IV), and the Merchant Shipping (Radio Installations) Regulations 1998, as applicable under UK law. All river users who regularly operate VHF radio equipment are reminded that VHF radio transmissions must be concise, clear, and strictly relevant to the safety of navigation, operational coordination, or emergency situations. The use of inappropriate language, unnecessary transmission, or non- In accordance with the Maritime and Coastguard Agency (MCA) guidance and the ITU Radio Regulations, priority must always be given to distress, urgency, and safety communications. Channel 16 must be continuously monitored unless actively engaged in a transmission on another channel, and it must only be used for hailing, distress, or emergency communications. Routine operational discussions should be conducted on the designated working channels. Regardless of which channel is used, or the subject being discussed, it is repeated that VHF radio transmissions must be concise, clear, and strictly relevant to the safety of navigation, operational coordination, or emergency situations All communication should be conducted with due respect and without unnecessary chatter or informal exchanges that could compromise the efficiency of maritime operations. Misuse or negligence in VHF communication not only disrupts operational effectiveness but may also endanger lives and maritime safety. |
Port of London Authority Notices to Mariners Nos SB3 of 2025 |
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Week 13 |
PLA - In recent years, Spring and Summer has seen an increase in pleasure vessels and narrowboats suffering mechanical breakdown. These incidents vary in type and severity, but are often easily preventable with proper pre- We remind all recreational river users to step up their vigilance and avoid the consequences of neglect to reduce breakdowns. Please check your engines, fuel, electrics, radios, anchors and other essential parts to ensure that they are in good working order and ready in an emergency. Suggested specific questions to have in mind for users Are the air, fuel and oil filters clean and free from biological infection? Are the cooling systems (tanks, hoses and in particular impellors) in good condition, not perished, secure and free from blockages? Are the fuel tanks and hoses clean, free from water and other contaminants and secure? (Significant condensation can occur through the Winter months). Does my vessel have enough fuel for the journey? Are the oil levels correct and has the oil been recently changed? Are the drive and auxiliary belts in good condition and properly tensioned? Are your batteries charged and with good wiring? Is your rudder and it’s fixings in good condition? Is your VHF working correctly? (Perform a radio check with London VTS). Is the anchor suitable for the vessel’s tonnage, the nature of the riverbed, with sufficient chain and warp and the bitter end made fast? (It’s suggested that a minimum of chain and rope should be 5m and 25m respectively for the Tideway. PLA charts should also be assessed for safe anchorages). Mariners are reminded the Tidal Thames is a Category C waterway above Denton Wharf, where wave heights of up to 1.2m and tidal flows of up to 4 knots can be encountered and sometimes exceeded. Vessels should be fully prepared to meet these conditions, which often require engines to work much harder than normal. If engines are underpowered or not maintained for the Tideway, Masters should consider whether the vessel is suitable for navigation. Please note that the calm waters of the UK’s canal system may allow defects such as contaminated fuel or perished cooling systems to go unnoticed. However, once a vessel enters waters that agitate contaminants like dirt in the tanks and demands more from engines; these deficiencies can cause significant failures, blockages and ultimately dangerous situations. If you suffer a mechanical breakdown, ensure your anchor is ready for emergency deployment. If you get into difficulty, with due regard of your location please call London VTS via VHF (Tel: 020 326 07711) to advise them of the situation. In an emergency you can call London Coastguard on Channel 16 (Tel: 999 and ask for coastguard). Recreational mariners are very welcome on the tidal Thames, but it is also a busy commercial waterway, and it is important for everyone’s safety that vessels can complete their journey without putting the crew and passengers on your vessel or others at risk. |
Port of London Authority Notices to Mariners Nos SB2 of 2025 |
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Week 11 |
River Medway – Short Reach. - Notice is hereby given that: Peel Ports have been notified of a sunken vessel on the Medway Cruising Club Moorings in Short Reach at the following approximate position: 51° 24. 354 N. 000° 33. 098 E. The wreck is known to be a blue and white cabin cruiser 28ft long which is visible at low water is now marked with an unlit, yellow ‘pellet’ buoy denoted “Wreck”. A cancellation to this notice will be published when the vessel has been recovered. Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS” or telephone 0151 949 6148 or 0151 949 6650. (Recorded Lines) |
Medway (Peel Ports) Notices to Mariners No 05 of 2025
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Week 10 |
Sizewell B Intake Tunnel Aid to Navigation NOTICE IS HEREBY GIVEN: That the Sizewell B Intake Tunnel Beacon is now lit. The beacon is positioned at: Latitude: 052 o 12.912 N Longitude: 001 o 37.600 E The Sizewell B Intake Tunnel Beacon has undergone maintenance works, and the faulty beacon light has been replaced. Trinity House have been informed through the Local Aids to Navigation Reporting System (LARS). This notice replaces local Notice to Mariners No. 14 of 2024, which is now withdrawn. |
Sizewell C Notice to Mariners No 20 of 2024
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Week 01 |
Establishment of the Sizewell C Harbour Authority NOTICE IS HEREBY GIVEN: That pursuant to the Sizewell C (Nuclear Generating Station) Order 2022, Sizewell C Limited are the legal regulators and operators of the Sizewell C Harbour Limits. A Terms of Reference has been agreed which confirms the appointment of the Sizewell C Harbour Authority Board by Sizewell C Limited for the governance of marine operations within the Sizewell C Statutory Harbour Authority jurisdiction. The Harbour Authority Board recognise that they have a responsibility to comply with the Port Marine Safety Code. The limits of the harbour area are bounded by an imaginary line commencing at the shore north of the authorised development at 52°14’0’’, 1° 37’ 37’’, then extending in a straight line to a point at 52°14’0’’, 1° 41’ 0’’, then extending in a straight line to a point at 52° 12’ 0’’, 1° 41’ 0’’, then extending in a straight line due west to the coast to a point at 52° 12’ 0’’, 1° 37’ 20.8, then following the level of Highest Astronomical Tide (HAT) to the point at 52°14’0’’, 1° 37’ 37’’. The chart shows the extent of the Sizewell C Harbour Authority area. The Sizewell C Harbour Authority have appointed the following individual as the “designated person” to provide independent assurance directly to the duty holder that the Marine Safety Management System, for which the duty holder is responsible, is working effectively and complies with the Port Marine Safety Code. Designated Person Name: Jerry Stanford Telephone Number: 07766 071538 Email : jeremy.stanford@edf- This notice replaces local notice to mariners No. 1 of 2024, which is now withdrawn. |
Sizewell C Notice to Mariners No 19 of 2024
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Week 38 |
Blakeney Harbour South Cardinal Mark - Southern tip of Blakeney Point Light has stopped working. It has been inspected and found to be severely damaged and has several lines of red paint suggesting a collision. A new light unit is on order. Take care when entering the harbour in poor light conditions and ensure vessels stay within the marked channel to maintain distance from the southern tip of Blakeney point marked by the south cardinal mark. A notice will be sent when the light is operational again. Port Lateral no. 10 - North west end of Blakeney Point QFL.R No.10 has been repositioned and replaced with a smaller can shaped marker, currently unnumbered and with the same light sequence. New position is N 52° 58.705’ E 000° 57.447' A notice will be sent when the numbers are refreshed. |
Blakeney Harbour Association dated 3rd September, 2024 |
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Week 29 |
Blakeney Harbour Association have made SEVERAL changes to the Aids to Navigation in Blakeney Harbour. **** SOUTH CARDINAL **** A South Cardinal Marker has been installed at the southern tip of Blakeney Point. It is imperative that all vessels keep south of the Cardinal marker because the submerged section of the point is incredibly shallow. The coordinates for the South Cardinal Marker are: 52°58.091'N 0°57.477’E. The light sequence for the South Cardinal Marker is: Q(6) + LFL 15s. **** CHANNEL AROUND POINT **** The main channel has moved south of the point around the old mussel beds. This table lists the lateral marker positions that have changed. This Google Maps image of the tip of Blakeney Point demonstrates the new channel location and the South Cardinal Marker position. **** OUTER HARBOUR LATERAL MARKERS**** The Lateral Markers have been relocated according to changes to the channel. This work is still under way and a further update will be sent as soon as there is suitable weather to continue to relocate the lateral markers. No. 9 Starboard Green spar mark. Light sequence Fl.G(2.5s) has moved North west to: 52°58.822'N 0°57.538'E No. 11 Starboard small cone mark. No light has moved North to: 52°58.732'N 0°57.419'E KEEP TO THE STARBOARD SIDE OF THE CHANNEL BETWEEN MARKERS 9 AND 11 UNITIL FURTHER NOTICE No 10 still needs to be moved north west away from the west end of the point, this will be carried out ASAP weather permitting. No.10 Port spar marker. Light sequence QFL.R Creates a gate with no. 9. Current lat and long: 52° 58.732’ N 000° 57.552’ E DO NOT PASS CLOSE TO NO.10 UNTIL FURTHER NOTICE No. 3 Starboard needs to be moves south due to a sand bank forming between no. 1 and no. 3. This will be carried out ASAP weather permitting. DO NOT PASS CLOSE TO NO.3 UNTIL FURTHER NOTICE No.3 Starboard spar mark. Light sequence Fl.G(2.5s) Current Lat and Long: 52° 58.841’ N 000° 58.106’ E |
Blakeney Harbour Association Notice dated 2nd July, 2024 |
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Week 28 |
PORT OF GREAT YARMOUTH - MARINERS ARE HEREBY ADVISED that Norfolk County Council will be undertaking maintenance works on Haven Bridge between 08:00 hours and 15:00 hours, from Tuesday 18th June 2024, and every Tuesday thereafter, until further notice. Norfolk County Council confirm that the bridge will be non- Mariners are reminded to maintain a listening watch on VHF Channel 12 at all times whilst within the Port of Great Yarmouth and to advise ‘Yarmouth Radio’ of their intention to conduct any manoeuvre within the Port prior to doing so. For further information please contact Great Yarmouth LPS on VHF Channel 12 (callsign ‘Yarmouth Radio’) or 01493 335511. For further information please use contact details below: General enquiries: 0344 800 8020 Website: www.norfolk.gov.uk |
Great Yarmouth (Peel Ports) Notices to Mariners No 33 of 2024 |
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Week 19 |
The Swale – Queenborough Harbour - NOTICE IS HEREBY GIVEN that work to recover a sunken vessel in Queenborough Harbour has been completed, however, the vessel has been towed to a location where it will be broken up and removed. The wreck now lies in the following approximate position which is in shore of and adjacent to Queenborough All Tide Landing 51° 25. 025N – 000° 44. 261 E - The remnants of the boat are submerged just below the surface at high water but are marked with a number of pellet buoys and surrounded by spill booms which will collect any debris coming from the wreck. All vessels are requested to keep clear of the obstruction until it has been fully removed. Further information can be obtained from Medway VTS on VHF Channel 74 (Callsign “Medway VTS”) or telephone 0151 949 6148 or 0151 949 6650. (Recorded Lines) |
Medway (Peel Ports) Notices to Mariners No 20 of 2024
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Week 3 |
Annual Bring Forward Certain Authorities carry or bring forward a number of standard 'Permanent' Notices to Mariners |
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Week 49 |
Essex Police Headquarters, PO Box 2, Springfield, Chelmsford, Essex. CM2 6DN Tel.101 23rd November 2021 Organised Crime Groups – Drugs Importation via Boats & Planes. The purpose of this letter is to raise awareness of an issue relating to Organised Crime Groups and the importation of controlled substances. Essex Police are aware that criminals around the Tendring coastline are using boats and small planes to drop off drugs on the mud banks. These packages are then collected by the criminal gangs and brought ashore and thus avoiding the chances of being stopped by Customs at a port and losing their shipments. These controlled drugs are then distributed and sold within the community of Essex and beyond. As part of our commitment to tackling organised crime, we are writing to the local Marinas and boating community to ask for your support in identifying potential suspicious behaviour so that we can work together to protect our Community. You will undoubtedly be aware of the detrimental effects, misery and harm that drugs bring, not only to our wider communities but, in particular, to those vulnerable individuals within society. How can you help There are a number of signs to look for which may be indicators that these criminal activities are taking place. Signs to look for ➢ Light aircraft making several slow passes over the same strip of coastline ➢ Packages being seen thrown or dropped out of these planes ➢ Mid- ➢ Suspects are seen with binoculars looking out in the same areas where the planes or boats have been visiting ➢ Small boats are launched near to these locations from the back of a trailer or small boats leave local marinas about the same time as the small planes and boats are seen as above. ➢ Suspicious night- ➢ General suspicious behaviour Police will always look to work with the boating community, and we are grateful for your support. Should you have any suspicions or concerns please report them to Essex Police via “101”. You can also report anonymously to CrimeStoppers at crimestoppers- Regards Steve Davey Prevent & Protect OCG Officer Essex Police steven.davey@essex.police.uk |
Dated 23rd November, 2021 from Essex Police
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Week 43 |
NAVIGATIONAL NEAR MISS & INCIDENTS - A new way of reporting Navigational Near Misses and Incidents has been developed and is now publicly available to all River Users through our website or the PLA Tidal Thames app on your smartphone. Download on the image for the full PDF |
Port of London Authority Notices to Mariners No 17 of 2021
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Week 40 |
NEW PLA PUBLICATION - The Port of London Authority has published a Port Information Guide which has been produced for all river users, vessel owners and operators, publishers of nautical information and any other party that needs nautical information. This guide contains an A to Z listing of key Port of London information for all Thames users. The Port Information Guide is a live document and will continuously be updated. Users are therefore encouraged, to not print or save copies of the guide for extended periods of time and always refer to our website for the latest version. The guide can be accessed on our website via the below link: https://www.pla.co.uk/Port- For queries about this guide, please contact our Marine Compliance team: SafetyManagement@pla.co.uk |
Port of London Authority Notices to Mariners No 15 of 2021
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Week 31 |
Kentish River Stour Estuary Chartlet This is available from the Sandwich Port and Haven Commissioners at |
There are conflicting dates 11th March or 11th July but it is considered valid.
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Week 10 |
REQUESTS FOR VESSELS TO PROCEED WITH CAUTION OR AT SLOW SPEED This replaces Portwide Notice 1 of 2021, which is hereby cancelled When a reduction on vessel traffic speed is required, the term “Proceed with Caution” or “Proceed at Slow Speed” is used by London VTS in appropriate broadcasts. The following should be noted by Masters, Berth Operators and other river users when requiring speed reductions requests be broadcast: 1. As a guide, requests for reduction in speed are appropriate for activities such as diving, salvage, heavy lifting, working on the waterline from scaffolding or pontoon/small boat, and bunkering operations. They may also be appropriate where the mooring facilities are limited e.g. when the vessel overhangs the berth or when a vessel is about to take the ground at a Not always Afloat but Safely Aground (NAABSA) berth. 2. A request for a reduction in speed of passing traffic should not be sought as an alternative to good seamanship such as the proper tending of lines and moorings in a tideway. When London VTS has agreed to broadcast a reduction in speed: 1. The activity requiring the speed reduction will be identified in the broadcast, from which Mariners should judge the speed appropriate to the circumstances. 2. The person responsible for the request must ensure that the vessel or installation concerned is displaying the international code flags “Romeo Yankee” by day, and illuminated rigid replica by night. Failure to do so will result in the termination of the broadcast. 3. London VTS should be informed as soon as there is no longer the requirement for a speed reduction and the Romeo Yankee signal removed. The speed reduction broadcast by London VTS will also be terminated. |
Port of London Authority Notices to Mariners No 8 of 2021
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2020 Notices for this area below |
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Week 36 |
RIVER MEDWAY– SALTPAN REACH - (General Directions for Navigation) NOTICE IS HEREBY GIVEN that all mariners are to observe the exclusion zones in relation to the Isle of Grain LNG Terminal Jetties Nos.8 & 10 in Saltpan Reach. Mariners are also to note that any unauthorised infringement of the LNG Exclusion Zones may result in prosecution. Berth Exclusion Zone Regulations: 1. When there is no LNG vessel berthed at the LNG Terminal no vessel (including pleasure vessels, PWC’s, fishing boats etc.) shall navigate within that part of the River Medway which is within an arc measuring 150 metres in any direction from the cargo transfer arms at the LNG Terminals. The cargo transfer arms are located at the following approximate position: Terminal No.10 51° 25.9405’N 00° 42.5448’E Terminal No.8 51° 25.9309’N 00° 42.1760’E 2. When there is an LNG vessel moored at the LNG Terminal no vessel (including pleasure vessels, PWC’s, fishing boats etc.) other than those attending the LNG terminal which are authorised by the Harbour Master or the operator of the LNG Terminal, shall enter any part of the River Medway which is within an arc measuring 250 metres (berth exclusion zone) in any direction from the cargo transfer arms of the LNG Terminal. 3. When there is an LNG vessel moored at the LNG terminal, the speed of all passing vessels navigating outside of the berth exclusion zone should not exceed 7.5 knots through the water whilst transiting. Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS’ or telephone 0151 949 6148 or 0151 949 6650. |
Medway (Peel Ports) Notices to Mariners No 2 of 2022 (re-
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Week 24 |
THE SWALE - NOTICE IS HEREBY GIVEN that due to movement and deterioration the steel framed remains of the vessel “Revenge” that was abandoned in Faversham Creek will be partially removed. The vessel “Liftmoor” will be on site from Monday 1st June 2020 and will be working for approximately 5 days to remove the bow section and parts of the superstructure that are causing a hazard to navigation. The operation will involve cutting/grinding of the steelwork and due to the nature of this “hotwork” passing craft are requested to navigate with caution. “Liftmoor” will maintain a listening watch on VHF Channel 74 at all times. Further information may be obtained from Medway VTS on VHF Channel 74, call sign “Medway VTS’ or telephone 0151 949 6148 |
Medway (Peel Ports (Notices to Mariners No 27 of 2020
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Week 20 |
Ministry of Defence (MOD) Shoeburyness: Range Sea Danger Area In anticipation of the lifting of the Government’s COVID- To enable the Range to work safely and ensure that hazardous activities do not present a risk to members of the public, it operates under the jurisdiction of the Artillery Ranges Byelaws 1936 and the Shoeburyness and District Military Lands Byelaws 1935 (under the Military Lands Acts 1892 to 1903). The byelaws govern the use of the land and rights of access and passage through the byelaw area. The byelaws cover an area of the Thames Estuary and the North Sea and the inner waterway that runs from Havengore Creek across to the River Roach and the River Crouch. This area comprises the Range Sea Danger Area (RSDA), unauthorised entry to this area is both prohibited and dangerous. QinetiQ is responsible for managing access to the RSDA and ensuring that boats, yachts and personal watercraft do not stray into the area, putting themselves and their vessels at risk. In order to help monitor the RSDA whilst the Range is active, QinetiQ uses marine surveillance radar and has a Range Safety Boat which patrols the in area and advises any unauthorised vessels to leave in accordance with the byelaws and in the interests of health and safety. To raise awareness of the location of the RSDA and help avoid incursions by unauthorised vessels, there is a section on the MOD Shoeburyness website which is dedicated to safety information for mariners. Here, mariners can find guidance on how to safely navigate in the vicinity of the Range, how to contact Range Control for advice and the meaning of the Red Flags that the Range uses to indicate the status of the Inner and Outer Sea Areas. If you or your members sail in the vicinity of the Range, we strongly recommend that you familiarise yourself with the restrictions. Our website also has a guide for anyone wishing to access the inner waterways via Havengore Bridge (currently closed to marine traffic), and we post status alerts on Twitter to notify when either Havengore Bridge or Potton Bridge is non- We would be most grateful if you could circulate this information amongst your members and other contacts in the sailing and watersports community and where possible, create a link from your website to our Information for Mariners page (see link below). If you have any questions or suggestions for improving the information, please let me know. You may also find the information in the attached leaflet of interest which you can print and circulate amongst your members if you wish. https://www.qinetiq.com/shoeburyness/Public- Nicki Uden – Community Liaison Officer, SHOEBURYNESS RANGE |
Dated 4th May, 2020 There is a pdf Download: |
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Week 3 |
Unmarked Obstruction – Faversham Creek NOTICE IS HEREBY GIVEN that a report has been received advising of an UNMARKED OBSTRUCTION in Faversham Creek close to the shore line between Buoys No.5 and No.7 The unmarked obstruction is located in Faversham Creek, the Swale in approximate position: 51° 20.193‘ N 00° 54.244’ E Reports received have identified the obstruction as being near to the shore line and being submerged over mid to high tide times. Further information may be obtained from Medway Navigation Service (VTS) on VHF Channel 74 call sign “Medway VTS’ or direct on telephone no. 01795 663025. |
Peel Ports (Medway) Notices to Mariners No 4 of 2019 (Brought forward from 2017)
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Notices still current from 2017 or earlier |
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Week 13 |
Dangerous Wreck on the Buxey Sand edge of the Swallowtail channel This is an 'unofficial' notice to Mariners. I have been told by Mr Alan Bird, a local oyster dredger and yachtsman who has seen detail of the 'Obstruction' in the channel between the Swallowtail and the Buxey Sand. Charts currently show there is an 'Obstn' drying 2m at 51.40'951N, 001.03'541E. However, Mr Bird records the position as 51°40’924N 001°03’660E - Mr Bird has submitted an H102 to the UKHO but kindly given me details of the wreck and a copy of the images. I have selected the best two images of the overview. Note that the tail end of the Swallowtail can be seen on the left of the image showing how narrow the channel is. The waypoint symbol on the chart image shows the position recorded by Mr Bird. |
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