Notices to Mariners Week 4

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UKHO Permanent/Preliminary/Temporary

1. ENGLAND – East Coast – Depths. – Five changes of depth in the Long Sand Head Two-Way Route around the Long Sand Head. The depth changes are slight suggesting there are no problems in the Shipping channel. Not likely to hinder leisure craft.
2. ENGLAND – South East Coast – NM Blocks. Legends. – This Notice announces UKHO blocks for 6 charts showing the final markings for the East Anglia One Offshore Wind Farm. The best example is illustrated Notices to Mariners) but all can be downloaded via the button on the same page.
3. ENGLAND – East Coast – Depths. – Two reductions of depth in the Corton Road (northern approaches to Lowestoft) on the west side of the Holm Sand. When considered along with NtM 772 of 2020 (0.3m) this is an area to avoid. Notice that Trinity House Notice 15 of 2020 moved the NW Holm SHB south to protect the channel. Worth noting in that area.


1. Harwich Haven – Maintenance Dredging – on or about the 20th of January 2021 the dredger Deo Gloria (LOA 70.36m) will commence maintenance dredging in the harbour, for a period of approximately 7 days. Materials will be disposed of to the beneficial sites in the River Stour and River Orwell. (see for the image of the locations of the disposal sites on the above quoted web page + select the Local list). Detailed dredger movements can be obtained from Harwich VTS on VHF Channel 71.
Lights and shapes as required by Collision Regulations will be exhibited and a listening watch on VHF Channel 71 will be maintained throughout.
2. THE SWALE – FERRY REACH – KINGSFERRY BRIDGE – Updated times – Lifting Restrictions 18th to 25th January 2021 – due to rail possession issues the work period and contingency dates for the planned maintenance and restrictions at Kingsferry Bridge has changed. Should the work not be completed during the first 5 nights (18th to 23rd Jan.) then 2 extra nights detailed below will be used. Due to scheduled maintenance work at Kingsferry Bridge between the above dates lifting restrictions will be imposed affecting all vessels. Engineering isolation periods will extend for longer periods but the following shows when bridge lifts will NOT be possible. No Available Bridge Lifts:
Date HW Sheerness From To
19.01.21 04:14 00:30 05:00
20.01.21 04:53 00:30 05:00
21.01.21 05:36 00:30 05:00
22.01.21 06:28 00:30 05:00
23.01.21 07:33 00:30 05:00
The following are contingency dates should work not be completed within the first 5 night shifts. No Available Bridge Lifts
Date HW Sheerness From To
24.01.21 08:45 01:00 08:00
25.01.21 09:55 00:30 05:00
Admiralty Chart Number 2572 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 or from Kingsferry Bridge on VHF Channel 10.
3. River Medway – Saltpan Reach – LNG Jetties 8 & 10 – Dredging Operations – dredging operations are due to take place at Grain LNG jetties 8 & 10, dredging will commence on or around 20/01/2021. Operations will be focussed around the “berthing boxes” and will be carried out by the water injection dredger ‘Maasmond’. ‘Maasmond’ will display the required signals for respective operations by day and night, all vessels are requested to pass with caution and minimise their wash. There is an image of the location on the Local List.
4. Works on Orwell Bridge – Highways England will be undertaking routine maintenance on Orwell Bridge commencing 1st Februrary for up to 4 weeks. This will involve work on the structure of the bridge around the pier tops.
Highways England will utilise debris netting to ensure the safety of river users and there will be no reduction to the bridge under clearance during these works. Additionally they have assessed the radiation hazard and there is no requirement to isolate vessel’s radar equipment. Therefore navigation of the River Orwell may continue as normal during this period.
5. Port of Wells – Dredging
6. Havengore Bridge: Update 15.01.21 – 
Havengore Bridge remains closed to marine traffic. A fault affecting the lowering sequence has been identified and engineers are expected to attend on Wednesday 20 January to conduct further investigation and repairs. We will issue the next update in the latter part of next week. We apologise for any inconvenience. Nicki Uden – Community Liaison Officer, SHOEBURYNESS RANGE

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