MDN 144/2025

Construction of wave wall at Sai Wan, Cheung Chau - works area established

Activeuntil 23 Mar 2027, 00:00 UTC (in 128 days)Received 23 Jul 2025, 00:00 UTC

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MARINE DEPARTMENT NOTICE NO. 144/2025 (Marine Works) Construction Works for Wave Wall at Sai Wan, Cheung Chau With immediate effect and for a period of approximately 20 months, construction works for wave wall at Sai Wan, Cheung Chau will be carried out within the area bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (A) to (E) and the adjacent shoreline: (A) 22-12.08N 114-01.27E (B) 22-12.09N 114-01.25E (C) 22-12.30N 114-01.34E (D) 22-12.34N 114-01.39E (E) 22-12.32N 114-01.41E 2. The works will be carried out by one dumb lighter and one ro-ro barge. One work boat and one tugboat will provide assistance. Vessels engaged in the works will display signals as prescribed in international and local regulations. 3. A working area of approximately 15 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. Silt curtains which are large pieces of netting to contain mud and sediments extending from the sea surface to the seabed, will be established within the works area. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the extent of the silt curtains. 5. The hours of work will be from 0700 to 1900 hours. No works will be carried out on Sundays and public holidays. Vessels employed for the works will stay in the works area outside the hours of work. 6. Vessels navigating in the vicinity should proceed with caution. 7. A drawing showing the works area is attached to this Notice. Ms. Lydia LAM Director of Marine (Acting) Marine Department Government of the HKSAR Date: 23 July 2025 Action File Ref.: L/M No. 24/25 in MD-PD&PS-F01-075-01A-003-P068

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Analysis

Activeuntil 23 Mar 2027, 00:00 UTC (in 128 days)

Construction of a wave wall at Sai Wan, Cheung Chau is in progress within a defined area bounded by five positions. Works commenced with immediate effect from 23 July 2025 and will continue for approximately 20 months. Working hours are 0700-1900 (hours as given) with no works on Sundays and public holidays. A 15 metre working area, yellow marker buoys with yellow flashing lights and silt curtains will mark the works and anchors.

Type: Offshore operations · severity moderate
Feed: Offshore works, rigs and towingAll warnings of this kind on the map, or as an API feed.
Location: Sai Wan, Cheung Chau
Validity: From 23 Jul 2025, 00:00 UTC
Until 23 Mar 2027, 00:00 UTCWith immediate effect and for a period of approximately 20 months. The hours of work will be from 0700 to 1900 hours. No works will be carried out on Sundays and public holidays.
Activity periods: 23 Jul 2025, 07:00 UTC - 23 Mar 2027, 19:00 UTC (Daily 0700-1900 (hours as given); no works on Sundays and public holidays)
Hazards: construction works, working vessels (dumb lighter, ro-ro barge, work boat, tug), anchors and anchor lines, silt curtains, marker buoys with yellow flashing lights

Worked out automatically from the warning text on 30 Sept 2026, 11:49 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

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