Notices to Mariners Week 49
1. ENGLAND – East Coast – Depths. – Two reductions of depth in the Shipway near the NE Bawdsey SHB and in the centre of the Shipway.
2. ENGLAND – South East Coast – Buoy. – Special Mark west of the NE Goodwin. This notice was first announced as a Temporary Notice (vide 2854(T) in week 24). It is now established as a Permanent Notice.
3. ENGLAND – East Coast – Depths. – Two new reductions of depth hard by the Newcomb Sand PHB. The image includes the previous changes about the S. Holm cardinal and associated depth reductions there vide NtMs No 772 and 5467 this year. We can conclude that the South Holm is trying to extend south and the south entrance of the Stanford Channel is being restricted. But at the moment at 5 metres it will not hinder leisure craft. That area is well monitored.
4. ENGLAND – East Coast – Depths. – Reduction of depth on the west side of the South Cross Sand (offshore Great Yarmouth). At 10m would not hinder leisure craft except that is an overfalls area and the reduction is substantially different to the surrounding depths.
5. ENGLAND – East Coast – Depths. – A reduction of depth on the centre of the DW channel in the Black Deep adjacent to the ‘BDM2’ special mark. At 15m+, unlikely to hinder leisure craft.
6. ENGLAND – South East Coast – Depths. – Two changes of depth in the North-East heading Sandettie TSS. Not likely to hinder craft.
7. ENGLAND – South Coast – Depth. Obstruction. – A surprise here perhaps. A new obstruction at 2.6m close to the western pier of the outer part of Clarence Quay in the Western Docks in Dover.
8. ENGLAND – East Coast – Depths. – Three reductions of depth in the Swale, one off the Queenborough ATL, one close to the S2 SHB and one close east to the S3 SHB.
9. ENGLAND – East Coast – Wreck. – A new wreck at 17m+ at the Barley South Cardinal Buoy which marks the Middle Cross Sand off Great Yarmouth. The image includes marking the earlier move of the Barley Buoy.
10. ENGLAND – East Coast – Depth. – One reduction of depth in the River Thames, Fiddler’s Reach. Not likely to hinder leisure craft.
1. RIVER THAMES – HALFWAY REACH SOUTHERN OUTFALL JETTY DREDGING OPERATIONS – On or about 21st November 2020, contractors working on behalf of Thames Water will commence dredging operations in the vicinity of the Southern Outfall Jetty. It is anticipated that these operations will take six days to complete. The chartlet epicts the location and approximate marine footprint of the works (see the Temporary List on: Notices to Mariners : The dredging works will be undertaken by the pusher tug HAVIK and water injection barge BALDR, and will display the lights and shapes as prescribed in Rule 27 of the International Regulations for Preventing Collisions at Sea 1972 namely: • By day, three black shapes in a vertical line the highest and lowest of which are balls and the middle one a diamond. • By night, three all-round lights in a vertical line the highest and lowest of which are red and the middle one white. Further details will be broadcast by London VTS on VHF Channel 14.
2. Harwich Haven – Maintenance Dredging – • From the 23rd of November 2020 the plough dredger Forth Drummer (length overall 26.00m) will start plough dredging within the Haven for approximately 14 days. • From the 23rd of November 2020 the survey vessel Porthos will start survey operations within the Haven for approximately 15 days. • From the 25th of November 2020 the trailer suction dredger Medway (length overall 118.47m) will be undertaking maintenance dredging in the Haven and approaches for approximately 12 days. Detailed dredger movements can be obtained from Harwich VTS on VHF 71.
3. Harwich Harbour & Approaches – Seasonal Recreational Marks – On or after the 1st December 2020 the following seasonal recreational mark will be withdrawn: (Positions given are WGS 84): Harwich Shelf – East Cardinal Buoy 51°56’.84N 001°18’07E
4. LOWESTOFT APPROACHES – SHOALING NORTH EAST OF HARBOUR ENTRANCE – Mariners and Port Users are advised of an area of shoaling approx. 700 metres North East of Lowestoft Harbour entrance, centred on approx. position 52˚ 28.555’N, 001˚ 45.936’E. Depths at 3.3m below Admiralty Chart Datum (ACD), have been identified at the extreme Western edge of the approach channel (just within the white sector of the Port Entry Light (PEL). Lowestoft Harbour Chart extract (BA1535) Mariners and Navigators are requested to navigate with caution when in Lowestoft Harbour approaches, using all means available to check and verify vessel position to ensure that the minimum required under keel clearance is available.
The Port Entry Light is an aid to navigation but should not be solely relied upon for an indication of vessel position. The light sectors will be re-aligned so that the shallow area is no longer within the white light sector. A new notice will be issued once this has been completed. Please contact Lowestoft Port Control, VHF Ch 14, Tel. 01502 572286, if additional information is required. Chartlet on the above quoted web page.
5. Sandwich Fairway Buoy – is temporarily off station. In its absence mariners should make their entry from about one cable due east of buoys 1 and 2 and follow the marks / buoys from there. Departing the river is the reverse of that described above.
6. Port of Wells…… is dredging
7. Norfolk Broads – Navigation Closure due to Essential Maintenance works on Trowse Swing Bridge River Wensum – the Amco Giffen on behalf of Network Rail will be undertaking essential maintenance works on the ‘Trowse’ Swing Bridge using underbridge equipment. River passage will be closed during the following periods. From Monday 14 December until Wednesday 23 December 2020 and then from Monday 28 December 2020 until Friday 8 January 2021. The closure will be positioned at the following grid reference TG245076 shown in red on the plan extract (a link can be found in the Temporary List). Please ensure that the area is taken into consideration for passage planning and when navigating in this area.
8. Had lost it! LOWESTOFT SE APPROACHES – SURVEY OPERATIONS – survey operations are scheduled to commence between the UK and Netherlands, commencing Friday 13th November. Duration of survey anticipated to be approx. 14 days (subject to weather delays). The survey operations will be conducted by survey vessel ‘Franklin’ and will commence from the UK Coast working Eastwards. The vessel will be deploying towed underwater survey equipment at which times will restrict her ability to manoeuvre. At such times the vessel will display relevant lights and shapes as prescribed in the International Regulations for Preventing Collisions at Sea.
The chart extract (in the Temporary list in the above quoted web page) shows the intended survey route, with initial survey positions listed.
1. 52° 27′ 00.4654″ N 1° 47′ 35.2484″ E
2. 52° 26′ 52.8904″ N 1° 52′ 28.5087″ E
3. 52° 26′ 07.8693″ N 1° 59′ 42.3601″ E
Mariners and Port users are requested to navigate with caution when in vicinity of these survey operations, affording the survey vessel Franklin as wide a berth as is safe and practical to do so.
Please contact Lowestoft Port Control, VHF Ch 14, Tel. 01502 572286, if additional information is required.
Link to details – http://www.crossingthethamesestuary.com/page9.html
Local NtMs compiled by and reproduced by kind permission of Roger Gaspar, author of Crossing the Thames Estuary