Notices to Mariners Week 15

Notices to Mariners Week 15 – Notices to Mariners for the Southern East Coast of the UK and across to France, Belgium and part of Holland

UKHO Permanent/Temporary/Preliminary

1. ENGLAND – South East Coast – Depths. – 4 reduced of depths at the Goodwin Knoll. The changes are not dramatic but the Knoll is gently rising. Note the ‘dot’ on the Knoll on the image; that indicates the location for the new Power Cable from west to East installed earlier this year. See the image and full details on this, these and Local Notices at
2. ENGLAND – East Coast – Depths. – 4 reductions of depth in and around the shipping channel in Sea Reach. At all over 12m+, unlikely to hinder leisure craft.
3. ENGLAND – East Coast – Depths. – Three reduced depths in the River Thames off Thurrock. At over 6m, this is unlikely to hinder leisure craft.
4. ENGLAND – East Coast – NM Block. – This is a similar UKHO block for the Greater Gabbard Wind Farm last week so effectively just catching up with the changes for another chart.
5. ENGLAND – East Coast – Buoyage. Light-beacons. – Seven changes of marks on the Holbeach Firing Practice Area in the Wash. (I suspect no-one will go there!)


1. Ha’penny Pier pontoons – Return to operational condition from Saturday 30th March 2019 – the pontoon berths at Ha’penny Pier, Harwich will be operational again from Saturday 30th March 2019. – as reported on the Forum before;
2. Ha’penny Pier The mooring facilities at Ha’penny pier will be open from Monday 1 April to 27 October 2019 – the usual long notice giving all details of the rules, the costs, the facilities etc. Have a look on the Temporary List on the above quoted page;
3. ROCHESTER – BRIDGE REACH – ROCHESTER ROAD BRIDGE – Foreshore clearance work. – in advance of maintenance work on Rochester Road Bridge foreshore clearance is due to take place on Friday 29th March, in approximate position 51° 23.55’N 000° 30.00’E. This will not restrict passage of vessels using the bridge spans but all river users are advised that the workboat “Avocet” will be operating in the area to assist this clearance. She will be maintaining a listening watch on VHF Channel 74 throughout. Mariners are advised to slow down, maintain a listening watch on VHF Channel 74 and navigate with caution keeping well clear when passing. May be finished now.
4. CANCELLED NOTICE – GARRISON POINT TRAFFIC WARNING LIGHTS – as report on the Forum of course. A nice bit of logic cancelling a cancellation notice – Traffic Warning Lights situated on Garrison Point Fort in the following approximate position are RESTORED: 51° 26.80´ N 000° 44.64´ E. The Traffic Warning Light is positioned to assist vessels in complying with General Direction No. 10, Navigation of Vessels of more Than 130 Metres length Overall Between Sunset and Sunrise and in Restricted Visibility. The Traffic Warning Light is a white light that flashes every seven seconds and is normally exhibited by day and by night. See full details in the Temporary List on the above quoted page.
5. Black Edge No 1 Lighted Buoy – River Roach – is back on station.
6. River Crouch – Longpole Reach – No Wash 8 Knot Speed Limit Buoys – repositioning and characteristics of 2 special lighted “NO WASH” 8 KNOT SPEED LIMIT BUOYS in Longpole Reach (River Crouch) at the Eastern and Western ends of Fambridge Yacht Haven’s yacht moorings abeam of North Fambridge Jetty. Lat Long and Light details can be found in the Temproary Page on the above quoted page.
7. Dredging Operations River Orwell – the trailing suction dredger ‘UKD Orca’ will be working in the Port of Ipswich and River Orwell from or about Friday 12th April 2019 for about 6 days. The deposit operation will take place in the Long Reach of the River Orwell. Mariners please note that during this operation there will be an unusual amount of discolouring to the water due to the increase in siltation from our deposit operation, which is being carried out in accordance with our Marine Licence. All vessels are requested to give this vessel a wide berth, especially when ‘UKD Orca’ swings in the Long Reach near No 3 Buoy following the deposit operations. ‘UKD Orca’ will be monitoring VHF Channel 68 and showing International Signals for a vessel engaged in Dredging. Details of the vessel movements will also be available from the Orwell Navigation Service.
8. LOWESTOFT BASCULE BRIDGE – TEMPORARY CLOSURE AND RESTRICTIONS TO MARINE TRAFFIC – the Bascule Bridge will be undergoing routine maintenance for the period of Thursday 4th April 2019 at 2000hrs until Friday 5th April 2019 at 0600hrs. During this period there will be no routine small boat openings.  Commercial vessel openings will be considered with a minimum of 12hrs notice and subject to the works schedule. Vessels restricted to HW period port entry/departure will be prioritised.  Small vessels and Leisure craft may be able to utilise a commercial vessel opening should one be scheduled during the restriction period, subject to the required transit being in the same direction, and only with consent of the Harbour Master via Port Control.
9. BROADS – Approaches to Potter Heigham Bridge – Bridge Road – Norfolk County Council will be undertaking essential structural maintenance works of the Potter Heigham Bridge. Note that vessels will be restricted and regulated in their movement in the vicinity of the bridge on Monday 29 April 2019. Passage of vessels will only be between 1100 hours to 1200 hours and 1530 hours to 1630 hours.
10. Blakeney Harbour Entrance – Vessels entering Blakeney Harbour should be aware that there is an East/West sand spit rapidly building between Harbour Entrance Starboard Buoy No. 1 (N 52° 58.897’ E 000° 58.280’ QG) and Harbour Entrance Starboard Buoy No. 2 (N 52°58.867’ E 000° 58.025’ Fl(2)G8s) Vessels entering the harbour should proceed with great caution between these two buoys, heading SE after passing buoy no. 1 before turning SW towards buoy no. 2, in order to avoid shallow breaking water over the new spit. We are anticipating major changes to the harbour entrance channel over the coming few months which we will be closely monitoring. Buoys will be moved to reflect these changes, and confirmed by further Notices to Mariners.
11. RAMSGATE HARBOUR – SOUTHERN BREAKWATER LIGHT (VQ Fl R), located on the end of Southern Breakwater is presently unlit.
12. London Array Wind Farm – All of the Wave Buoy’s have been currently removed for service – see the notice in the Temporary List on the above quoted page, but there are some maintenance issues:

• Crew transfer vessels: Windcat 18, Windcat 21, Windcat 27, Windcat 29, Windcat 36 and Windcat 39 will take offshore technicians to the Offshore Wind Turbine Generators and Offshore Substations for routine operations and maintenance works.
• Survey Vessels Spectrum 1 and Spectrum 2 will be conducting survey ops in and around the windfarm as required.
• Jack-up vessel MPI Adventure and the Crew Transfer Vessels Vos Sampson and VOS Trifaldi are on site carrying out blade maintenance at various locations around site along with supporting the MPI Adventure.
• Crew transfer vessel: MPI Dulcinea and MPI Rucio will take Rope Access technicians to the Offshore Wind Turbine Generators to carry out planned blade repair works at various location around site.
• Cable Lay vessel Bokabarge 82 , support vessels Isa , Bommel , Panda ,and crew transfer vessels Avocet , Gardian 3 and Smeaton Array will be on site carrying out various cable repairs where necessary.

A 50m radius advisory caution zone is established around each wind turbine and offshore substation platform. • A long term 500-meter exclusion zone has been implemented around D20 – (51° 38.024’N 01° 24.612’E) as a precaution until further notice due to a damaged blade. • A short term 500-meter exclusion zone has been implemented around C17 – (51° 37.132’N 01° 25.641’E) this location stands in the Foulgers Gat channel and a wide approach is requested. • The MPI Adventure will move from WTG to WTG, spending approximately 36-48 hours at each location. When located at a WTG, a 500-meter exclusion zone will be put in place centered on the MPI Adventure. • Short term 200-meter exclusion zones will be in place at various locations while MPI Dulcinea is carrying out rope access works

That’s it.

That’s it.

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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