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Local Authority Notices to Mariners |
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Week 23 |
Harwich Haven - Mariners are advised that the obstruction on the seabed at Berth 5 in Harwich Navyard is confirmed to be removed. |
Harwich Haven Authority Notices to Mariners No 45 of 2026. |
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Week 23 |
Harwich Haven - Mariners are advised that the Pye End buoy (51o 55.030’N 001o 17.894’E) is currently off station until further notice.
A further local notice to mariners will be issued when the buoy has been restored. |
Harwich Haven Authority Notices to Mariners No 46 of 2026. |
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Week 23 |
Lowestoft Inner & Outer Harbour Areas and Approaches – Bathymetric Survey
Mariners and Port Users are advised that bathymetric survey operations of Lowestoft Inner & Outer Harbour Areas and Lowestoft Approaches, are scheduled for Tues 26th & Wed 27th May. The vessel conducting the survey will be ‘RS11’
The ‘RS11’ will be monitoring VHF Channel 14 throughout survey activities. Vessel movements will be monitored and co- Vessels are requested to give the survey vessel a wide berth and pass at slow speed to minimise vessel wash. Please contact Lowestoft Port Control, VHF Ch14, Tel. 01502 572286 (Option 3) if further information is required. |
Lowestoft (ABP Ports) Notices to Mariners No 15 of 2026 |
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Week 23 |
Lowestoft Gull Wing Bridge – Marine Closure
Mariners and Port- Vessels with an acceptable air draft will still be permitted to transit underneath the bridge subject to permission from the Bridge to do so. The Bridge will remain open to vehicles during this closure. There may be some restrictions to pedestrian routes. Please contact Lowestoft Port Control, VHF Ch14, Tel. 01502 572286 (Option 3) if further information is required. |
Lowestoft (ABP Ports) Notices to Mariners No 14 of 2026 |
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Week 23 |
Approaches to King’s Lynn – Hunstanton and North Beach Heacham. Hunstanton Waterski Club National Race Event Mariners are advised that on Saturday 6th & Sunday 7th June 2026 the Hunstanton Waterski Club are holding a National Race Event which is to be held on a course off Hunstanton Beach and Heacham North Beach. The course will be marked by 3 yellow visibility buoys positioned in a triangular shape. The Races are due to take place on Saturday 6th between 1030 hrs and 1500 hrs and Sunday 7th between 1100 hrs and 1500 hrs. Mariners are requested to keep a sharp lookout and avoid the area whilst the races are taking place and maintain a watch on VHF CH 16/14. Safety boats will be in attendance during racing. Contact race organiser – Samantha Impey 07971 641 384 Saturday High Tide 10:20 Height 6.22m (Low Tide 17:28) Sunday High Tide 11:04 Height 6.04m (Low Tide 18:13) TIMES SUBJECT TO CHANGE DEPENDING ON CONDITIONS ON THE DAY BUT WILL BE WITHIN THE WINDOW OF RACE TIMES ABOVE – ANY DEVIATION WILL BE NOTIFIED |
KING'S LYNN CONSERVANCY BOARD Notices to Mariners No 9 of 2026
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Week 22 |
River Thames - Mariners are advised that on or around 27th May 2026, contractors instructed by Calor Gas will commence dredging operations in the area surrounding Calor Gas Jetty on Canvey Island. The general location of the works is indicated by a red box on the chartlet. These dredging operations will be carried out by the Water Injection Dredging method and will be conducted during ebb tides only. The dredging works are scheduled to last no longer than 10 days. 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’. International Code Flags ‘Romeo Yankee’ will be displayed accordingly. The vessel is required to display lights and signals as per the International Regulations for Preventing Collisions at Sea and maintain a listening watch on VHF channel 68. Further information will be broadcast by London VTS on VHF 68. |
Port of London Authority Notices to Mariners Nos L27 of 2026
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Week 22 |
River Thames - Mariners are advised that, on or about 15th May 2026 works will commence at Old Sun Wharf to undertake fender replacement and grab chain installation. These works are expected to take place at around low water and last approximately 2 weeks, with the location of works indicated in the chartlet. Fender replacement and grab chain installation works will be carried out along the river wall, involving a spud- 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. |
Port of London Authority Notices to Mariners Nos M43 of 2026
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Week 22 |
River Thames - Mariners are advised that, on or about 18th May 2026 works will commence in vicinity Canary Wharf Pier to inspect the river wall. Works will include persons working close to or on the waterline, abseilers from the river wall and safety boat attendance. These works are expected between 0800 and 1800 daily, and to last approximately 1 week. Works will be conducted by rope access contractors along the face of the river wall. All vessels not involved in the works shall keep well clear of the abseilers. During works, the safety boat PRONTO will be in attendance. 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. |
Port of London Authority Notices to Mariners Nos M42 of 2026
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Week 22 |
River Thames - Mariners are advised that, on or about 18th May 2026, contractors instructed by Oikos Storage Ltd. will commence dredging operations in the approaches to Oikos No. 1 Jetty. The general location of the works is indicated by the red box on the chartlet. These dredging operations will be carried out by the Water Injection Dredging method and will be conducted during ebb tides only. The area to be dredged comprises the Oikos No. 1 Jetty berth box as well as the rear, clearance channel and the approach / transit area to the berth. The dredging is planned to be completed no later than 23rd May 2026. 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. 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 L26 of 2026
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Week 22 |
Beacon Repair Works – River Stour Mariners are advised that from 14 – 30 May 2026, navigation beacon repair works will be taking place in the River Stour in the following locations: Beacon Name Latitude Longitude Holbrook Beacon 51o 57.219’ N 001o 10.355’ E No. 2 Beacon 51o 57.030’ N 001o 10.215’ E No. 6 Beacon 51o 56.979’ N 001o 07.875’ E
These works will involve the cleaning, repairing and re-
Mariners are advised to navigation with caution in these areas and requested to pass at slow speed. |
Harwich Haven Authority Notices to Mariners No 42 of 2026.
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Week 22 |
Harwich Haven - Mariners are advised that survey and dredging operations are taking place as follows: GNH Crusader 2EQW Survey 29/05/26 Felixstowe, Harwich Harbour, Stour MTS Valour 9407299 Plough 23/05/26 Felixstowe, Harwich Harbour, Stour Shoalway 9556337 Dredger 26/05/26 Felixstowe, Harwich Harbour, Stour Magnor 9787601 Dredger 22/05/26 Felixstowe, Harwich Harbour
This local notice to mariners replaces 2026- Contact Harwich VTS (VHF 71) for latest dredger traffic information. |
Harwich Haven Authority Notices to Mariners No 44 of 2026. |
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Week 22 |
Port of Great Yarmouth - NOTICE IS HEREBY GIVEN that maintenance dredging and associated survey operations will be undertaken in the Outer Harbour and the immediate seaward approaches commencing on or around Friday 15th May 2026, with completion expected Friday 29th May 2026. Dredger MAAS will be working 24h and the schedule of operations will be determined by berth occupancy and weather conditions. Associated hydrographic survey will be undertaken by vessel RS11, which will be working in the Outer Harbour and seaward approaches intermittently during daylight hours. Both vessels will display appropriate day shapes and lights in accordance with the COLREGs. Great Yarmouth LPS will provide contemporaneous information regarding dredging and survey activity on request. Vessels may be restricted in their ability to manoeuvre and mariners are requested to be vigilant, maintain safe distance, minimise wash and keep clear of working tracks where safe to do so. Mariners are reminded to maintain a listening watch on VHF Channel 12 whilst navigating 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 telephone 0151 949 6648. |
Port of Great Yarmouth (Peel Ports) Notices to Mariners No 22 of 2026 |
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Week 21 |
River Thames - Mariners are advised that on Saturday 23rd May a single stand- The jet ski ‘COAST RUNNER’ will depart Butler’s Wharf Pier and proceed to Tower Bridge to commence the event and will be supported by ‘BRAVO LIMA’ which will remain with the jet ski until clear of London Gateway Port in Sea Reach. A Harbour Service Launch displaying blue flashing lights will conduct Local Traffic Control in the Upper Pool near the start point until the event is underway and will then proceed outward bound with the jet ski and support vessel until clear of Margaretness. Traffic in the area should contact ‘TOWER CONTROL’ on VHF 14 for further instructions. A further Harbour Service Launch will rendezvous with the vessels in Long Reach near the Queen Elizabeth II bridge and will follow the vessels out until clear of London Gateway Port where the jet ski will continue the remainder of the voyage unaided. The jet ski will then follow Sea Reach keeping outside of the authorised channel and will cross to the north at the recommended small craft outward bound crossing point between Sea Reach No. 5 and No. 4. The jet ski will then proceed to the north via the WEST SWIN, MIDDLE DEEP and EAST SWIN channels until clear of the Port Limits and will report to London VTS at Sea Reach No. 4 and Gunfleet Spit Buoy. London VTS will monitor the progress of the event throughout and BRAVO LIMA will report throughout. Communications with the jet ski should be made via BRAVO LIMA until clear of London Gateway Port where the vessels will separate. Further information will be included in the navigational broadcasts by London VTS on VHF 14/68/69. Further information about the event is available on the Channel to Coast website: * https://channeltocoast.co.uk/ The Port of London Authority cannot guarantee the security of any external links used in this document. Any external links used will be marked with an asterisk (*). |
Port of London Authority Notices to Mariners Nos L25 of 2026 |
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Week 21 |
River Thames - This Notice supersedes and replaces M96- The exclusion zone has been established due to structural issues in a shoreside building, which pose a potential risk to vessels navigating in the vicinity. The zone extends 60 meters from the river wall across the frontage of the affected building, as illustrated. No vessels are permitted to enter the marked exclusion zone. |
Port of London Authority Notices to Mariners Nos M40 of 2026
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Week 21 |
Harwich Haven - Mariners are advised that survey and dredging operations are taking place as follows: Maverick MGTR9 Dredger 20/04/26 2 weeks+ Following Harwich areas: Halfpenny Pier; Harbour Master’s Pier; Fishermen’s moorings Harwich Lifeboat Station GNH Crusader 2EQW Survey 24/04/26 17/05/26 Felixstowe, Harwich Harbour, Stour MTS Valour 9407299 Plough 29/04/26 17/05/26 Felixstowe, Harwich Harbour, Stour Shoalway 9556337 Dredger 25/04/26 17/05/26 Felixstowe, Harwich Harbour Strandway 9664457 Dredger 05/05/26 17/05/26 Felixstowe, Harwich Harbour Magnor 9787601 Dredger 03/05/26 17/05/26 Felixstowe, Harwich Harbour
This local notice to mariners replaces 2026- Contact Harwich VTS (VHF 71) for latest dredger traffic information. |
Harwich Haven Authority Notices to Mariners No 40 of 2026. |
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Week 21 |
Suffolk Yacht Harbour Piling Operations
Mariners are advised that piling operations will be taking place within Suffolk Yacht Harbour This will take place between:- Wednesday 13th May and Friday 29th May 2026. Piling will be taking place within the area outlined in red on the chartlet. All water users are requested to keep well clear of this area during this period. |
Ipswich (ABP Ports) Notices to Mariners No 09 of 2026
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Week 20 |
River Thames - Mariners are advised that, on or about 05th May 2026, contractors instructed by the Port of Tilbury London Ltd. will commence a program of dredging operations at: (1) Tilbury Dock Entrance; (2) Tilbury Grain Terminal; (3) Northfleet Hope Container Terminal; (4) Tilbury Landing Stage; and (5) T2 CMAT. The general location of the works is indicated by the red boxes on the charlets. These dredging operations will be carried out by vessels AQUADELTA and THOR using the water injection dredging method and will be conducted during ebb tides only. The dredging is expected to be complete no later than 31st May 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 ‘London VTS’, ‘Section 4’ 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.
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Port of London Authority Notices to Mariners Nos L24 of 2026
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Week 20 |
River Thames - Mariners are advised that, commencing on or about 6th May 2026, water injection dredging operations will be carried out at Purfleet Deep Water Jetties. The area to be dredged comprises the berth boxes off the Upper and Lower Berths. The chart extract below indicates the general dredging area, bounded by the red markings. This dredging will be carried out during ebb tides only by water injection dredger AQUADELTA (IMO 9941831; LOA 48.04m). An alternate dredging vessel may be substituted for AQUADELTA if necessary. These dredging operations are expected to be complete no later than 5th June 2026. Mariners are advised to exercise caution and remain vigilant while navigating in the vicinity of Purfleet Deep Water Jetties during these operations. 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 (IRPCS). Further information will be broadcast, as necessary, by London VTS on VHF channel 68. |
Port of London Authority Notices to Mariners Nos L22 of 2026
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Week 20 |
Thames Estuary - Mariners are advised that, on or about Sun 03rd May 2026, a survey of the Neuconnect cable is expected to commence The survey will be carried out by vessel GENESIS, which will deploy a Remotely Operated Vehicle (ROV) to perform the survey, while following the cable route at slow speed. While the survey is in progress, all vessels are required to keep at least 250m clear of GENESIS at all times. Whenever a vessel, for reasons of safe navigation, is unable to keep at least 250m clear of GENESIS, that vessel may, subject to permission from London VTS, pass GENESIS at a closer range, but never less than 100m. Vessels intending to navigate in the vicinity of GENESIS may be subject to traffic management carried out by London VTS in the interests of safety. Masters / Pilots are advised to contact London VTS in advance of approaching GENESIS to allow for early coordination and management of traffic movements. All vessels passing GENESIS or navigating in the vicinity of her works are reminded to be mindful of their wash effects. Requirements to proceed with caution or at slow speed during these operations 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’. 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. Diagrams illustrate the Neuconnect cable route, in blue, from Kilometre Point (KP) numbers marked. See the Download. The survey is expected to commence at KP15 and proceed outward beyond the Seaward Limit of the London Pilotage District at KP76. |
Port of London Authority Notices to Mariners Nos L21 of 2026
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Week 20 |
Harwich Haven -
From or around 03 May 2026 backhoe dredger Magnor (IMO: 9787601) will be carrying out dredging operations in the lower Harwich Harbour and Port of Felixstowe (berth 9), with the assistance of tug Duchess (IMO: 9928944), see location diagram and table. Tugs Union Topaz (IMO: 9406427) and Union Onyx (IMO: 9406415) will be working with split- Works will continue for approximately 10 days. Contact Harwich VTS (VHF 71) for latest dredger traffic information. |
Harwich Haven Authority Notices to Mariners No 39 of 2026.
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Week 20 |
London Array Offshore Wind Farm (Outer Thames Estuary) - All mariners are advised that the Jack- Jack- Equipment will be periodically deployed and suspended from the vessel crane during jack up operations. Call Sign: OWLB2, MMSI: 219615000, IMO: 9670793 A 500m radius restricted zone will be in place, centred on the Wind Server at all times whilst onsite. If access is required into this zone for non- |
London Array Offshore Wind Farm (Outer Thames Estuary) Notices to Mariners No 3 of 2026 |
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Week 20 |
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 back on station NOTICE TO MARINERS 3 of 2026 IS HEREBY CANCELLED |
Crouch Harbour Authority Notices to Mariners No 9 of 2026 |
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Week 18 |
River Thames - Mariners are advised that on or about Monday 20th April 2026, contractors instructed by the operators of White Mountain Jetty will commence works to repair fendering on the berth face. The general location of the works is indicated by the red box on the chartlet. These works will involve pontoon RP BLACKWALL; tug SILVER BEAM may be in attendance as well as small craft, including MARY J and/or BADGER. Lifting operations and personnel working on the waterline are to be expected during these works. It is planned that operatives will be working between 0700 and 1700, Monday to Friday, and that these works will be complete no later than 15th May 2026. 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’. The display of these signals will be in addition to any other signals, lights or shapes required under local regulations and the International Regulations for Preventing Collisions at Sea. Further details will be broadcast, as necessary, by London VTS on VHF Channel 14. |
Port of London Authority Notices to Mariners Nos L19 of 2026
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Week 18 |
Surveyed Depths – Harwich International Port and approaches 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). This notice replaces local notice to mariners No. 92 of 2025, which is now withdrawn. |
Harwich Haven Authority Notices to Mariners No 36 of 2026 |
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Week 18 |
Harwich Haven - Mariners are advised that the temporary pipe mooring in Parkeston Anchorage (see Figure 1 below) will now remain in place until approximately October 2026. This local notice to mariners replaces notice 2025-
Between April and October 2026 there are three (3) outbound pipe towage operations planned. Harwich VTS (VHF 71) will issue navigational safety information broadcasts and advise vessels accordingly. The pipes are each approximately 750- operations.
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Harwich Haven Authority Notices to Mariners No 35 of 2026
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Week 18 |
River Medway – Saltpan Reach - NOTICE IS HEREBY GIVEN THAT: dredging operations are due to commence at BP Isle of Grain Jetty No.1 on or around 6th May 2026 with a projected completion date of 6th June 2026. All dredging will be focussed on the berthing box of IOG. Jetty No.1 and will be carried out by the water injection dredger ‘Aquadelta’. ‘Aquadelta’ will maintain a listening watch on VHF Channel 74 at all times and display the required signals for respective operations by day and night. All vessels passing Isle of Grain Jetty No.1 during the dredging period are requested to navigate with caution reducing speed and 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 24 of 2026
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Week 18 |
Port of Great Yarmouth - NOTICE IS HEREBY GIVEN that maintenance work will be undertaken on quayside drainage outfall flaps at various locations within the river port, commencing on Monday 13th April, between the hours of 0800 and 1600 Monday to Friday. Anticipated completion is on or before Thursday 21st May. The Environment Agency workboat KINGFISHER will be working at roughly 450 outfall locations within the river port during the course of the campaign. Personnel will be working on quay wall equipment from the deck of the workboat. KINGFISHER will maintain a listening watch on VHF Ch12. Masters are advised to keep a vigilant lookout and to pass KINGFISHER giving ample room at the slowest safe speed to minimise vessel wash. Masters may obtain location information during the works by contacting Great Yarmouth LPS on VHF (Ch 12, station name “YARMOUTH RADIO”) or telephone 01493 335511 |
Port of Great Yarmouth (Peel Ports) Notices to Mariners No 17 of 2026 |
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Week 18 |
Ipswich Lock Operation Mariners are advised that the Ipswich lock has received an effective temporary repair on the West Outer Gate. The Lock will still operate on 1 outer gate as a standard procedure until a full repair can be affected. Vessels with a large beam unsuitable for a 1 gate operation can request the second gate to be opened. This request should be made in good time to ensure the gate is prepared for use. The gates will require further maintenance to fully rectify the issues as they are subsea. This N to M will be updated with dates and details on the future works. Mariners requiring more information should contact ONS on VHF CH68. |
Ipswich (ABP Ports) Notices to Mariners No 6a of 2026 |
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Week 17 |
Harwich Haven - 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 15 May 2026, whenever the weather permits. Morgan James 3 - Between Landguard Point & Blackman’s Head Acoustic Doppler Current Profiler (ADCP) survey and water sampling operations in cross channel transects
Boblin & Pure Chance - Cross river/estuary transects of River Stour at Bristol Buoy Acoustic Doppler Current Profiler (ADCP) survey and water sampling operations in cross river/estuary transects 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. This notice replaces local notice to mariners 2026- |
Harwich Haven Authority Notices to Mariners No 34 of 2026 |
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Week 17 |
East Coast of England - River Nene Anchorage - Mariners are advised that W1 light buoy (52° 55’.703N 000°16’.524E) is off station and the AIS “Aid to Navigation” signal should be disregarded. A replacement buoy will be established in due course. Please contact the Harbour Office for further information. |
KING'S LYNN CONSERVANCY BOARD Notice to Mariners No. 8 of 2026 |
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Week 16 |
Gravesend Reach - Mariners are advised that, on or about Tuesday 7th April, contractors instructed by the operator of Red Lion Wharf will be undertaking Fender Repairs and Structural Investigation works. These works are programmed for a 5- The chartlet shows the general location of the works, indicated by the red box: Works will be undertaken from crane barge “TMS MAVERICK”, to be positioned alongside Red Lion Wharf for the duration of the works, further supported by various Tugs and Safety craft. The works will include, but may not be limited to, diving operations, heavy lifts, core sampling and working at height in MEWPs. During these works, 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, which are illustrated below: When diving operations are in progress, in addition to ‘Romeo Yankee’ the following signals will be displayed. By day, International Code Flag ‘Alpha (A)’ and a red flag near the diver’s point of entry into the water. These signals are displayed in addition to any lights, shapes or other signals specified by the International Regulations for Preventing Collisions at sea and local regulations. Further information will be broadcast by London VTS on VHF Channel 68. |
Port of London Authority Notices to Mariners Nos L16 of 2026
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Week 16 |
Sea Reach - Investigations Mariners are advised, commencing late April 2026, for an estimated period of approximately 8 weeks, seabed sampling and geotechnical investigations will be undertaken in the London Gateway and outer estuary areas. Activities will take place within the following areas: London Gateway Approaches (Manoeuvring Area) Yantlet Channel Knock John Channel Western approaches to the Sunk Inner Precautionary Area A full description of works locations can be seen in the Download Description of Vessels and Works - MV Flatholm – Vibrocoring & Grab Sampling Call Sign: GHLZ MMSI: 235014266 IMO: 7626774 LOA: 23.3 m | Beam: 8.0 m | Draft: 2.5 m The survey vessel MV Flatholm will conduct vibrocore and grab sampling throughout the works area. Working times will vary according to tidal conditions. During sampling operations, MV Flatholm will be Restricted in Ability to Manoeuvre in accordance with COLREGs and will exhibit the appropriate day shapes and lights. The vessel will also transmit the appropriate AIS RAM status. JackUp Barge Drilling – OCM 80 Mariner JackUp Barge – OCM 80 Mariner – Drilling Operations Call Sign: TBC LOA: 18.3 m | Beam: 12.0 m | Draft: 1.52 m For up to 10 days, the JackUp Barge OCM 80 Mariner will undertake drilling operations within the London Gateway Manoeuvring Area. When elevated, the jackup will be unable to manoeuvre and will remain fixed in position. MV ShakeDog and associated crew transfer RIB will be in attendance. All operations will be fully coordinated with London VTS. eabed sampling will be planned and undertaken around commercial traffic movements. MV Flatholm will pause operations and stand clear when instructed by London VTS or when required to ensure the safe passage and manoeuvring of deep- MV ShakeDog – JackUp Relocation & Crew Transfer Call Sign: 2FSPS MMSI: TBC IMO: 8434178 LOA: 19.1 m | Beam: 8.3 m | Draft: 2.2 m Mariners are advised to: Navigate with caution. Maintain a safe passing distance from all vessels engaged in works. Minimise wash, particularly in the proximity of the jackup barge. Follow all instructions issued by London VTS, attending vessels, and safety craft. Due to the varied nature of works, operations may take place 24 hours per day, subject to weather, tides, and operational requirements. 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. |
Port of London Authority Notices to Mariners Nos L15 of 2026
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Week 16 |
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 0.8m below chart datum, plus height of tide. Contact Harwich VTS or Haven Pilots for further information regarding tidal windows. This local notice to mariners replaces 2026- |
Harwich Haven Authority Notices to Mariners No 33 of 2026 |
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Week 16 |
Halfpenny Pier Mooring and Leisure Facilities, Harwich The seasonal leisure facilities will re- Ha’penny Pier will be manned by Harwich Haven Authority’s Duty Pier Master between the hours of 0830 and 1730 during the open season, including weekends and bank holidays. The Duty Pier Master can be contacted on +44 7748 154039 for enquiries or assistance. Visiting from outside the UK? Overseas visitors should follow the advice issued by the UK Government before travelling. In addition to notifying Border Force of your intentions to enter the UK you must also make a custom declaration to the HMRC National Yachtline +44 (0) 300 123 2012 before disembarking your vessel. Leisure vessels Visiting leisure vessels up to 20 metres length overall (LOA) can use the facilities at Ha’penny pier pontoons for a maximum stay of 72 hours. Except for large vessels (see below), berths cannot be booked in advance as we operate on a first come first served basis. Be advised that vessels may be double or triple berthed if the mooring facility is busy and prevailing conditions are suitable. As shown on the diagram in ther Download, the outside berths are prioritised for larger vessels, and the inside berths are predominately for smaller crafts. Leisure vessels must not moor in the Harbour Ferry or unloading areas, which are clearly marked on the map. For full details of fees and facilities, please use the Dowload button |
Harwich Haven Authority Notices to Mariners No 32 of 2026
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Week 15 |
Harwich Haven - From or around 31 March - Buoy Name & Description Latitude Longitude Pennyhole - Cork Ledge Racing Mark - Armada Racing Mark - Fox’s - Cobbolds Point Buoy - Dovercourt Bay - 51° 55.97’ N 001° 17.39’ E 51° 55.81’ N 001° 16.99’ E 51º 55.65’ N 001º 16.59’ E 51º 55.63’ N 001º 16.55’ E 51° 55.40’ N 001° 16.48’ E 51º 55.18’ N 001º 16.42’ E Shotley Horse - Speed Limit Marker Buoy - Beacon Hill - |
Harwich Haven Authority Notices to Mariners No 29 of 2026 |
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Week 15 |
Rivers Crouch, Colne and Blackwater -
Mariners are advised that APEM will be deploying and retrieving sondes activities between May 2026 and August 2026 in The Blackwater Outer, Crouch and Colne. These operations will support environmental monitoring and research efforts. Further details, including specific locations, timings, and safety guidance, are provided below. Research details Vessel JEAN T with length 16.89m and breadth 5.25m, and GNH Crusader with length 14.8m and breadth 4.9m will display the appropriate signals/lights as appropriate for their vessel is able to maintain a continuous listen watch on VHF Channel 11 and 16. There are no requirements for an “ease down” from other crafts. Survey Area Estimated date of deployment Estimated date of retrieval BCCTS5 Sonde Crouch 13th May ‘26 14th June ‘26 BCCTS6 Sonde Crouch 13th May ‘26 14th June ‘26 BCCTS7 Sonde Crouch 14th June ‘26 14th July ‘26 BCCTS3 Sonde Blackwater 14th June ‘26 14th July ‘26 BCCTS4 Sonde Blackwater 14th June ‘26 14th July ‘26 BCCTS1 Sonde Colne 14th June ‘26 14th July ‘26 BCCTS2 Sonde Colne 14th July ‘26 15th Aug ‘26 |
Notice to Mariners from APEM Group, dated March 2026
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Week 13 |
Obstruction on seabed at Harwich Navyard, Berth 5 Mariners are advised there is an obstruction on the seabed at Harwich Navyard as follows: Obstruction 51° 56.948’ N 001° 17.438’ E 2.9m below Chart Datum |
Harwich Haven Authority Notices to Mariners No 26 of 2026
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Week 13 |
Lowestoft Approaches – Port Entry Light (Kirkley Sector) -
Mariners and Port Users are advised that the Lowestoft (Kirkley), Sector Port Entry Light (PEL), positioned 52˚ 27.71’N, 01˚ 44.54’E, remains extinguished. Light maintenance will continue on 12th March to re- Colour Arc of Coverage Characteristics Green 222°- Green 223°- White 224°- White 225°- White 228°- Red 229°- Red 230°- Navigators and Mariners are requested to navigate with caution in Lowestoft approaches, using all available means to monitor and maintain vessel position as required. An updated notice will be issued once the Kirkley Sector light has been re- |
Lowestoft (ABP Ports) Notices to Mariners No 07b of 2026 |
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Week 13 |
Sizewell C - NOTICE IS HEREBY GIVEN: that following the review, the Marine Fishing and Recreation Zone (MFRZ) referred to in Local Notice to Mariners No10 of 2025 will remain in force within Sizewell C Harbour for a further period of 12 months from 10 March 2026. Details of the MFRZ are confirmed below - Marine Fishing and Recreation Zone This area of the harbour is designated for use of leisure fishermen and other leisure users of the harbour waters. Commercial, service and construction vessels are excluded from this area except where unavoidable and with the explicit permission of the Harbour Master. Mariners will be informed of any planned minor construction vessel works within the MFRZ in advance by Notice to Mariners. Leisure users within the Marine Fishing and Recreation Zone will be subject to the General Directions of the harbour and any Harbour Master Directions promulgated by the Harbour Master. The MFRZ (outlined by solid red lines on attached chartlet) is an area contained within the coordinates below: Latitude Longitude 52° 12.6742' N 001° 39.9994' E 52° 11.9981' N 001° 39.9967' E 52° 11.9979' N 001° 37.3296' E 52° 12.8096' N 001° 37.4392' E 52° 12.8209' N 001° 38.4366' E |
Sizewell C Notice to Mariners No 14 of 2026
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Week 12 |
Lowestoft Outer Harbour and Approaches – Continuation of XOcean USV transits
Mariners and Port Users are advised that transits of XOcean remotely piloted Unmanned Surface Vessels (USVs), are scheduled to continue from Lowestoft, to and from offshore survey areas at various windfarms and designated windfarm areas off the East Anglian Coastline. These surveys will be at various times over the forthcoming months. Operations are anticipated to be undertaken until mid- The USVs will mobilise from RNSYC basin (Outer Harbour), or Talisman Quay (Inner Harbour), then transit Lowestoft approaches. A support craft will escort the USVs for transits in the Harbour and in the close approaches to the port, monitoring VHF Ch14. XOcean USV The vessels have a black hull and yellow superstructure. They are small vessels – 4.5m LOA. They are fitted with AIS Class B transmitters, but sit low in the water, so may not be easily detected visually, subject to sea conditions. Typical transit routes to/from Lowestoft are shown. Mariners are requested to navigate with caution in the vicinity of these USV, in areas they are known to be operation, or transit routes to/from survey areas. This notice replaces NTM No.34/2025 which is hereby cancelled. 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 5 of 2026
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Week 12 |
River Thames - This Notice supersedes and replaces L83- Mariners are advised that the works at Calor Gas Canvey terminal have extended to include the east side of the Jetty approach. These works include use of scaffolding, operatives working on the waterline and lifting operations. A safety boat will attend at times during the works. Mariners are advised that the works at Calor Gas Canvey terminal have extended to include the east side of the Jetty approach. These works include use of scaffolding, operatives working on the waterline and lifting operations. A safety boat will attend at times during the works. These works are expected to be complete by 31st August 2026 and the general location of the works is shown by the red markings in the chartlet. 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 (RY)’, which are illustrated here. 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 L11 of 2026
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Week 12 |
London Array Offshore Windfarm - All mariners are advised that the Jack- Jack- Jack- Equipment will be periodically deployed and suspended from the vessel crane during jack up operations. Support Tug: Sea Juliett Tug Sea Juliett has a length of 32.27m with a beam of 9.1m and will be engaged in towing the Jack- Support Tug: Wil S. Tug Wil S has a length of 32.27m with a beam of 9.1m and will be engaged in towing the Jack- Support Tug: GPS Avenger GPS Avenger has a length of 27.02m with a beam of 9.1m and will be engaged in towing the Jack- A 500m radius restricted zone will be in place, centred on the Wind Pioneer whilst pinned on location. If access is required to this zone for non- |
London Array Offshore Wind Farm (Outer Thames Estuary) Notice to Mariners 02/2026 |
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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 |
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 |
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 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 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 |
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 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, 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 |
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 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 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 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 |
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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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 – 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 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 |
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 |
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 |
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 |
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 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 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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