MDN 248/2025

SÉCURITÉ

Dredging and submarine outfall maintenance off Black Point and Tap Shek Kok

No longer in forceReceived 26 Nov 2025, 00:00 UTCArchived 30 Sept 2026, 12:45 UTC

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MARINE DEPARTMENT NOTICE NO. 248/2025 (Marine Works) We are one in Promoting Excellence in Marine Services MARINE DEPARTMENT NOTICE NO. 248/2025 (Marine Works) Marine Works off Black Point and Tap Shek Kok With immediate effect and for a period of approximately six months, marine works involving dredging operations and submarine outfall maintenance works will be carried out within the following works areas: Works Area 1: This area is bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (A) to (F): (A) 22-24.54N 113-54.22E (B) 22-24.67N 113-54.18E (C) 22-24.72N 113-54.26E (D) 22-24.74N 113-54.29E (E) 22-24.82N 113-54.37E (F) 22-24.76N 113-54.44E Works Area 2: This area is bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (G) to (J): (G) 22-22.57N 113-54.88E (H) 22-22.61N 113-54.84E (I) 22-22.71N 113-54.92E (J) 22-22.68N 113-54.98E 2. The works will be carried out by one grab dredger and two derrick lighters. Two hopper barges, two work boats and four tugboats will provide assistance. The number of vessels engaged in the works will change from time to time to suit operational requirements. Vessels engaged in the works will display signals as prescribed in international and local regulations. 3. The hours of work will be round-the-clock. A working area of approximately 50 metres around the working vessels will be established. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the positions of the anchors extending from the working vessels. 4. A silt curtain which is a large piece of netting to contain mud and sediments extending from the sea surface to the seabed will be established beside the grab dredger. Yellow flashing lights will be laid to mark the extent of the silt curtain. 5. Diving operations will be carried out from time to time during the hours of work. Vessels navigating in the vicinity should proceed with caution and keep clear of the works areas at slow speed, bearing in mind that there are divers working in the areas. 6. A drawing showing the works areas is attached to this Notice. Mr. S.F. WONG Director of Marine Marine Department Government of the HKSAR Date: 26 November 2025 Action File Ref.: L/M. No. 37/25 in MD-PD&PS-F01-075-01A-003-P070

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Analysis

No longer in force

Marine works including dredging and submarine outfall maintenance will be carried out within two defined works areas off Black Point and Tap Shek Kok. Operations were stated to commence with immediate effect from 26 November 2025 and continue for approximately six months, with round-the-clock work. Multiple work vessels (grab dredger, derrick lighters, hopper barges, work boats and tugs) will be on site; a 50 metre working area, yellow marker buoys with yellow flashing lights and a silt curtain will be deployed. Diving operations will occur from time to time; vessels should proceed with caution and keep clear at slow speed.

Type: Dredging / works · severity moderate
Feed: Offshore works, rigs and towingAll warnings of this kind on the map, or as an API feed.
Location: off Black Point and Tap Shek Kok
Validity: From 26 Nov 2025, 00:00 UTC
Until 26 May 2026, 00:00 UTCWith immediate effect and for a period of approximately six months
Activity periods: 26 Nov 2025, 00:00 UTC - 26 May 2026, 00:00 UTC (round-the-clock)
Hazards: dredging operations, submarine outfall maintenance, silt curtain, diving operations, anchored/working vessels and marker buoys

Worked out automatically from the warning text on 30 Sept 2026, 11:38 UTC. It can be wrong: the official warning text is the authority.

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This warning's analysis also has:

Action for mariners
Keep-clear distance
Ships named
Lights and buoys affected
Translations
Nearby lights and rescue centres

The action for mariners, the keep-clear distance, contacts, ships named, translations and the nearby lights and rescue centres come with Lagom and every higher plan, and with the API plans. The official warning text above is always free.

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Keywordsdredging operations diving operations divers working keep clear of

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