Notices to Mariners Week 25

UKHO Permanent/Temporary/Preliminary Notices

1. New Editions of ADMIRALTY Charts to be published on 8th July, 2021 – Chart 1975 England – East Coast, Thames Estuary, Northern Part. 1:50,000 – Chart 2052 – International Chart Series, England – East Coast, Orford Ness to The Naze. 1:50,000
2. ENGLAND – East Coast – Depth. Rock. – Interesting, a rock is found in the dredged area for Harwich Harbour SSE of the N. Shelf SHB. But at 14.2m is unlikely to hinder leisure craft.
3. ENGLAND – East Coast – Pontoons. Buoyage. – The Pontoon Barge and associated lit special mark close to the Cliffe Pumping Station on the east bank of Lower Hope Reach (River Thames) has been moved north close to the recommended Inward Small Craft Crossing Point.
4. ENGLAND – East Coast – Drying heights. Drying contours. Depths. – This notice is the changes for the Ore entrance. To do my usual practice of amending the existing chart is rather complicated because of the detailed scale thereby leaving an unclear image. I recommend you use the ECP download at East Coast Pilot – Downloads which incorporates the changes.


1. RIVER MEDWAY – CHATHAM NESS – Scotline Terminal – Dredging Operations – dredging operations are due to take place at Scotline Terminal in Rochester. Dredging will commence on or around 21st June 2021 and is expected to be completed by 25th June 2021. Operations will be focussed on the Scotline terminal berth and it’s immediate approaches and will be carried out by the water injection dredger ‘Borr’. ‘Borr’ will display the required signals for respective operations by day and night, all vessels are requested to pass with caution and minimise their wash.
2. Wreck of the SS Richard Montgomery – Prohibited Area – The SS Richard Montgomery was a US Liberty Ship built in 1943 by the St. John’s River Shipbuilding Company, Jacksonville, USA. The ship sailed from the USA to the UK as part of a convoy in August 1944 with a cargo of 7,000 tons of munitions, of which 1,400 tons (Net Explosive Quantity [NEQ]) remains on board in the forward section of the wreck. On arrival in the Thames Estuary, the vessel was directed to anchor in the Great Nore Anchorage, off of Sheerness. However, on the next tide, the ship’s anchor dragged and vessel drifted on to Sheerness Middle Sands, a bank running east from the Isle of Grain, to north of the Medway Approach Channel. Approximately half of the cargo was salvaged at the time, unfortunately, the vessel split in two and sank before the remainder of the cargo could be recovered. The wreck now lies in approximately 15 metres of water, 1.5 miles from Sheerness and the Isle of Grain and 5 miles from Southend.
The wreck is designated under section 2 of the Protection of Wrecks Act 1973 and there is a no-entry exclusion zone around it. The wreck is under 24-hour surveillance by Peel Ports London Medway. The MCA carry out regular surveys of the wreck and its environment in order to monitor its condition, to identify any changes and deterioration and to inform future management strategies. Statutory Instrument 1973 No. 1690 identifies the prohibited area around the wreck as straight lines joining the following points:
51° 28’ 04” N; 00° 47’ 12” E – 51° 27’ 57” N; 00° 47’ 22” E
51° 27’ 50” N; 00° 47’ 11” E – 51° 27’ 58” N; 00° 47’ 01” E
The prohibited area is clearly defined with 4 yellow, special mark light buoys at the N,S,E and W corners with a further 12 orange spar buoys spaced between the special marks (3 on each side). Signage on the 12 spar buoys clearly denotes the area as “Dangerous” All craft, unless given authorisation by the ‘MCA Receiver of Wreck’, shall not enter the prohibited zone. If observed in the exclusion zone, masters/owners will be subject to enforcement actions and risk potential prosecution by the governing body. See the chartlet in the Local List on Notices to Mariners
3. RIVER MEDWAY – GILLINGHAM REACH – Chatham Lock Approaches – Dredging Operations – 
due to take place in Gillingham Reach. Dredging will commence on or around 15th June 2021 and is expected to be completed by 18th June 2021. Operations will be focussed in the approaches to Chatham Dock locks and will be carried out by the water injection dredger ‘Borr’. ‘Borr’ will display the required signals for respective operations by day and night, all vessels are requested to pass with caution and minimise their wash.
4. Depths at the Port of Ipswich and River Orwell – the minimum working depths of the Port of Ipswich and River Orwell, inside the buoyed channel, based on the hydrographic surveys done on 25 May 2021. Depths are in relation to Admiralty Chart Datum. River Orwell minimum depth of the navigation channel: 5.6m. Mean Dock Level of 6.4m, Orwell Quay: 5.5m, Gas works: 3.53m, New Eagle Wharf: 3.53m, Old Custom House: 3.0m – more commercial depths in the Notices on the above quoted page.
5. Lowestoft Inner Harbour – Dredging and Small Barge Activities – dredging and other Harbour bed survey activities related to the Gull Wing Construction, are scheduled to commence today 10th June, for a duration of approx. 3 weeks. The dredging activities are anticipated to take approx. 2 weeks and will be undertaken in the yellow shaded area as indicated in the snapshot (see in the Local List). Dredging will be undertaken via a long reach excavator working from a 20m x 12m spud leg barge ‘NEVA’, transferring spoil to 2 x small 16m x 3.5m hopper barges. The barges will be manoeuvred between the dredge location and quay area on Riverside (South side of Lake Lothing), by work boat ‘Buster Crabb’, who will monitor VHF Channel 14 throughout works operations. The works activity will also be supported by small safety boat ‘Pioneer’. Dredging activities will take place in daylight hours only.
6. Approaches to King’s Lynn – Foul Area, Establishment of light Buoy – anchoring equipment lost to the north of No.1 light buoy has been located and is now marked by a yellow special mark buoy with light character Fl (5) Y 10s.
The area of designated foul ground (*) is now a circle of diameter 100m centred on the following position: 52°56.462’ N 00° 21.523’ E . Operations to fully recover the equipment along with the buoy are scheduled to be undertaken within the week subject to weather. Craft involved in subsequent operations to locate and recover the equipment are to be given a wide berth and will maintain a listening watch on VHF Ch. 14 & 16.
7. Port of Wisbech – River Nene – Buoy Moves – new position – Buoy No 9 GreenCone Fl.G.3s N52,50.903 E000,12.828;
8. NATIVE OYSTER RESTORATION WORKS – WEST MERSEA – Starting Monday 14th June 2021 works will commence on the Essex native oyster restoration project within a defined restoration box, of which the north-west corner is located approximately 500m offshore to the south-east of West Mersea, approximately 2000m (west to east) by 1000m (north to south). This work will consist of habitat restoration through the cleaning of the seabed in the North of the Restoration Box. These works are expected to be concluded by 20th June 2021 subject to satisfactory weather conditions. Past work within the restoration box includes the deposition of shell and stone material, so be mindful of the raised seabed in this location. and the deployment of spat collectors (large metal frames) within the area marked by large, yellow danger marks. This smaller marked area should not be entered.
Other activities to take place this year include Scientific Monitoring. These activities will take place between July and October 2021 (exact dates to be confirmed) and separate notices will be issued before such work commences.
9. Port of Wells – Dredging is back!
10. Port of Ramsgate – Ramsgate Approaches- B 2 BUOY – has now been repaired.