MDN 229/2025

SÉCURITÉ

Silt curtains installation at Aberdeen South Typhoon Shelter outer breakwater

No longer in forceReceived 07 Nov 2025, 00:00 UTCArchived 30 Sept 2026, 12:45 UTC

Warning text

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MARINE DEPARTMENT NOTICE NO. 229/2025 (Marine Works) Establishment of Silt Curtains along both sides of the Outer Breakwater at Aberdeen South Typhoon Shelter With immediate effect and for a period of approximately nine months, marine works involving the establishment of silt curtains will be carried out in the following works areas: Works Area 1: This area is bounded by straight lines joining the following coordinates (WGS 84 Datum) from (A) to (D) and the adjacent shoreline: (A) 22-14.19N 114-09.67E (B) 22-14.20N 114-09.67E (C) 22-14.20N 114-09.76E (D) 22-14.19N 114-09.76E Works Area 2: This area is bounded by straight lines joining the following coordinates (WGS 84 Datum) from (E) to (H) and the adjacent shoreline: (E) 22-14.18N 114-09.76E (F) 22-14.17N 114-09.76E (G) 22-14.16N 114-09.67E (H) 22-14.17N 114-09.67E 2. Silt curtains are large pieces of netting to contain mud and sediments extending from the sea surface to the seabed. Yellow flashing lights will be laid to mark the extent of the silt curtains upon completion. 3. The works will be carried out by one work boat. Vessel engaged in the works will display signals as prescribed in international and local regulations. 4. A working area of approximately 20 metres around the work boat will be established. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the positions of the anchors extending from the work boat. 5. The hours of work will be from 0700 to 1900 hours. No works will be carried out on Sundays and public holidays. Vessel employed for the works will not stay in the works areas outside the hours of work. 6. Vessels navigating in the vicinity should proceed with caution. 7. 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: 7 November 2025 Action File Ref.: L/M No. 47/25 in MD-PD&PS-F01-075-01A-001A-P088

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Analysis

No longer in force

Cancelled by MDN 259/2025 (archived)

Marine works to establish silt curtains along both sides of the Outer Breakwater at Aberdeen South Typhoon Shelter began with immediate effect on 7 November 2025 and will continue for approximately nine months. Works are carried out by one work boat within two small defined works areas adjacent to the shoreline and marked by yellow marker buoys with yellow flashing lights. Working hours are 0700-1900 daily; no works on Sundays and public holidays and the work boat will not remain in the areas outside working hours. Vessels in the vicinity should proceed with caution and keep clear of a working area of approximately 20 metres around the work boat.

Type: Offshore operations · severity moderate
Feed: Offshore works, rigs and towingAll warnings of this kind on the map, or as an API feed.
Location: Aberdeen South Typhoon Shelter, along both sides of the Outer Breakwater
Validity: From 07 Nov 2025, 00:00 UTC
Until 07 Aug 2026, 00:00 UTCWith immediate effect and for a period of approximately nine months
Activity periods: 07 Nov 2025, 07:00 UTC - 07 Aug 2026, 19:00 UTC (Works hours 0700-1900 daily; no works on Sundays and public holidays; vessel will not stay outside hours)
Hazards: silt curtains, work boat, marker buoys with flashing lights, anchor lines

Worked out automatically from the warning text on 30 Sept 2026, 11:39 UTC. It can be wrong: the official warning text is the authority.

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

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Keywordstyphoon

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