Notices to Mariners Week 12


Notices to Mariners Week 12 – Notices to Mariners for the Southern East Coast of the UK and across to France, Belgium and part of Holland

UKHO Permanent/Preliminary/Temporary

1. BELGIUM - Light. - Amending MOW4 - again - This is a repeat of NtM 1162 of Week 10 to catch up with two additional UKHO charts.
2. NETHERLANDS - Buoyage. - Temporary notice notifying the position of two new north cardinal buoys off the Domburg coast (on way to the Roompot).
3. ENGLAND - East Coast - Wrecks. Depths. Obstruction. - Further survey details on the Haisborough Sand (note NtM 1170 in week 10 – see the adjacent image). One suspects it may have had an extensive survey planning for the Norfolk Boreas Wind Farm. Details of 5 wrecks and obstructions and two reduced depths.
4. FRANCE - North Coast - Depth. - An unusual location for a reduction of depth on the Le Barriere between Cap Gris-Nez and Cap Blanc-Nez; the first in the area of ten years of monitoring. One reduction of depth worth noting.
5. NETHERLANDS - Depths. - Three reduced depths, two off the Goeree coast and one off Zeebruggee.
6. ENGLAND - South East Coast - Wrecks. - Reduction of depth over the wreck at the Goodwin Fork! At over 6 metres though, leisure craft should not be hindered.
7. ENGLAND - East Coast - Depths. - Three reduced depths in the Sunk Precautionary Area and on the Long Sand Head. No significant change of shape or movement at the Long Sand Head at present.
8. BELGIUM - Depths. - Nine reduced depths on the Paardenmarkt shoal and adjacent area.


1. GREENWICH REACH GREENWICH SHIP TIER ISOPHASE LIGHT TRIAL - On or about 12th March 2019, for a period of approximately two weeks, the light characteristic of the outer lower wing buoy of Greenwich Ship Tier will be changed from the current Fixed Blue light to Isophase Blue 1s. This change is indicated in the chartlet. This trial is being undertaken to assess whether an alternative light characteristic will improve visibility of the Greenwich Ship Tier mooring buoys as well as other mooring buoy locations. Reports from vessel masters and operators on the effectiveness of the alternative light characteristic should be made to the Upper District Harbour Master (
2. WOOLWICH REACH (UPPER) - ISLAND JETTY - REPOSITIONED CARDINAL MARK - This Notice supersedes M90 of 2018. On or about Tuesday 5th March 2019 a PLA vessel will reposition the South Cardinal Mark at the former Island Jetty to mark the extremity of the work site of the new Royal Wharf Pier. On completion of the installation of piles, the South Cardinal Mark will remain in position until the arrival of the new pontoon. The South Cardinal Mark will display a white light with characteristics Q(6)+LFl.15s. See the chartlet depicting the new location of the South Cardinal Mark.
3. ROCHESTER - BRIDGE REACH - ROCHESTER RAIL BRIDGE - Diving Operations to carry out underwater examinations of all below water sections on Rochester Rail Bridge from 11th to 13th March 2019, in approximate position 51° 23.55’N 000° 30.06’E. All Diving Operations are programmed to take place over the daytime low water slack periods therefore span closures will not be required. The dive support and safety boat “Dentex III” will be in attendance and will maintain a listening watch on VHF Channel 74. She will display the International Code of Signals Flag “A” at all times that divers are in the water. Mariners are advised to slow down, maintain a listening watch on VHF Channel 74 and navigate with caution keeping well clear when passing.
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.
4. Shoeburyness MOD Range - Unusual Activity Alert: Wednesday 13 & Thursday 14 March 2019 from approximately 09:00hrs, QinetiQ will be carrying out activities at the Shoeburyness Range on behalf of the MOD, which may be visible in the vicinity of the Thames Estuary. The activity involves the use of airborne munitions which are designed to illuminate large areas and therefore, members of the public may report repeated observation of distress signals/flares or similar up to 3km out to sea. All activity on the Range is conducted in a strictly controlled environment and presents no danger to the public. This work, as with the vast majority of work undertaken on the site, is subject to suitable acoustic forecasts and tide times, which are governed by weather conditions on the day. Consequently, the date of the activity may be subject to change. If members of the public are concerned by Range activity, they can call the freephone Careline on 0800 0560108.
5. Navigation Restriction due to Dredging Operations on the River Waveney 2019 - dredging operations are programmed to commence from Monday 15 April until Friday 30 August 2019, during the hours of 0800 hours and 1600 hours daily, excluding weekends. The works may restrict the access passage of vessels from the north of Stanley Carr to the A146 over Bridge. The navigation will remain open but mariners must exercise great care whilst proceeding past the works. All equipment will be lit and signage will be in place to warn of restrictions and delays.
6. Navigation Restriction due to Private Works on the River Waveney 2019 - marine contractors will be carrying out replacement work to the moorings adjacent to ‘Waterside’ – 200m downstream of St. Olaves Bridge - Between Monday 18 March and Monday 1 April 2019. Where the works are being undertaken the channel may be restricted. The navigation will remain open but boaters must exercise great care whilst proceeding past the works. All equipment will be lit and signage will be in place to warn of restrictions and delays. TM456996 please ensure that the new position is taken into consideration for passage planning and when navigating in this area.
7. Port of Wells - dredging.

All full details and images can be found at: on either the chronological list for the UKHO notices or the Temporary List for the Local Notices.

Link to details -

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


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