Notices to Mariners Week 11

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UKHO Permanent/Temporary/Preliminary

1. New Editions of ADMIRALTY Charts to be published on 1st April, 2021 – Chart 1503 – International Chart Series, England – East Coast, Outer Dowsing to Smiths Knoll including Indefatigable Banks.; Chart 1504 – International Chart Series, England – East Coast, Cromer to Orford Ness.; Chart 1610 – International Chart Series, England – East Coast, Approaches to the Thames Estuary.
2. ENGLAND – East Coast – NM Blocks. – Two UKHO blocks showing the entrances of the George V lock and Gallions Reach Marina in Gallions Reach of the River Thames.
3. ENGLAND – East Coast – Note. Legend. Lights. – This notice marks a Bridge construction over Lake Lothing (not illustrated) and the deletion of two yellow lights marking pontoons in Hamilton Docks of Lowestoft Harbour.
4. NETHERLANDS – NM Blocks. – This notice includes 6 UKHO blocks for 3 charts of the Dutch Walcheren coast. 2 blocks are for the Westerschelde which are ouside the area I monitor. The other 4 cover two areas of the Oostgat Channel, specifically the Westkapelle light and Kaapduinen light.
5. ENGLAND – East Coast – Depths. – Two reductions of depth in the River Thames, Bugby’s Reach.
6. NETHERLANDS – Buoy. – A new West Cardinal buoy has been temporarily deployed on the approaches to the Slijkgat channel (Goeree, Holland).


1. RIVER THAMES – NORTHFLEET HOPE – DREDGING OPERATIONS – On or around 9th March 2021, tug ‘JEAN T’ will commence plough dredging operations at Hall’s Jetty, Northfleet. Dredging will take place on the ebb tide only, with expected completion around 12th March 2021. 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. The chartlet can be found at: Notices to Mariners showing the approximate footprint of the marine works. Further details will be broadcast by London VTS on VHF Channel 68.
2. Rock Obstruction (Harwich Harbour) – Mariners are advised that a rock obstruction has been identified in the following approximate position at 14.2m chart datum; 51° 56.35 N 001° 18.56 E – That is in the deep water channel.
3. PORT OF GREAT YARMOUTH – Haven Bridge Mechanical Fault – due to mechanical issues Haven Bridge is currently unable to lift for vessels. Peel Ports are working with the bridge owner Norfolk County Council to resolve the issues as swiftly as possible.
4. Orwell Bridge Electrical Testing – UTC ☒ BST ☐ – Due to electrical testing taking place on the Orwell Bridge by Highways England, the centre span navigation lights (flashing yellow) will be offline during the following times:
– 4th March 09:00 to 15:30: – 5th March 09:00 to 15:30: – 9th March 09:00 to 15:30: – 10th March 09:00 to 15:30. The port and starboard navigation lights either side of navigational channel at the foot of the bridge piers will not be affected by this work.
5. Kings Lynn Fleet Flush – UTC ☒ BST ☐ – Notice is hereby given of the dates for the anticipated Fleet Flush for March 2021 are as follows:
Thursday 11th March 10:00 – 11:30: Friday 12th March 11:00 – 12:00: Saturday 13th March 11:00 – 12:00: Monday 15th March 11:30 – 13:30: Tuesday 16th March 12:00 – 13:00: Wednesday 17th March 12:30 – 13:30: Friday 26th March 09:00 – 10:30: Monday 29th March 11:30 – 13:30: Tuesday 30th March 12:30 – 14:30. All Masters are instructed to ensure that adequate lines are used as normal during spring tide flushes. Flushes will be carried out with an approx.. dock level of 7.0m
6. Kings Lynn – Dredging operations March 2021 – UTC ☒ BST ☐ – Notice is hereby given that from 12 March untill 19 March 2021, the grab dredger Cherry Sand will be dredging in the King’s Lynn enclosed dock and the Greater Ouse off the Dock entrance, River berths and off the Fleet area. Disposal will take place as West Stones in the entrance to the river Greater Ouse. All vessels are requested to keep clear of the Cherry Sand and pass at slow speed. The Cherry Sand will be keeping a listening watch on VHF ch 14. This notice will automatically cancel on 20 March 2021 at 1200.
7. Lowestoft Approaches – Stanford Channel – South Holm Buoy – the South Holm lighted buoy, approx. position 52° 26.700’N, 001° 47.200’E, marking the southern extreme of the Holm Sand and southern entrance to the Stanford channel, is reported to be damaged which has effected the buoys top mark. Notice will be provided when the buoy has been repaired. Please contact Lowestoft Port Control, VHF Ch14, Tel. 01502 572286, if additional clarification or information is required.
8. Approaches to King’s Lynn – Amendments to buoyage . – due to changes in the profile of the approach channel to King’s Lynn, the following amendments to buoyage will take place on or about 8th March 2021
a) No. 21 light buoy to be moved approx. 50m x 060°(T) to 52° 50’.360N 00°21’.650E
b) No. 22 light buoy to be moved approx. 95m x 005°(T) to 52° 50’.430N 00°21’.710E
c) No. 23 light buoy to be moved approx. 190m x 000°(T) to 52° 49’.930N 00°21’.510E
All the above works will be carried out by the buoying vessel St Edmund and all mariners are requested to pass at slow speed and give as wide a berth as is possible whilst works are being carried out. Contact the St Edmund on VHF Ch. 14 for further information.
9. Port o’ Wells dredging :sick:

Local NtMs compiled by and reproduced by kind permission of Roger Gaspar, author of Crossing the Thames Estuary