MDN 230/2025

Marine site investigation at Cheung Sha, Lantau Island

No longer in forceReceived 10 Nov 2025, 00:00 UTCArchived 30 Sept 2026, 12:45 UTC

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MARINE DEPARTMENT NOTICE NO. 230/2025 (Marine Works) Marine Site Investigation at Cheung Sha, Lantau Island With immediate effect and for a period of approximately six months, marine site investigation works involving drilling of vibrocores, boreholes and cone penetration tests will be carried out within the area bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (A) to (D) and the adjacent shoreline: (A) 22-14.00N 113-57.71E (B) 22-13.82N 113-57.80E (C) 22-13.72N 113-57.49E (D) 22-13.90N 113-57.49E 2. The works will be carried out by two jack-up barges, one flat-top barge and one dumb lighter. Two tugboats will provide assistance. Vessels engaged in the works will display signals as prescribed in international and local regulations. 3. A working area of approximately 50 metres around each barge and dumb lighter will be established. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the positions of the anchors extending from the flat-top barge and dumb lighter. Yellow flashing lights will be installed at the four corners of each jack-up barge to indicate its position. 4. 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. 5. Vessels navigating in the vicinity should proceed with caution. 6. A drawing showing the works area is attached to this Notice. Mr. S.F. WONG Director of Marine Marine Department Government of the HKSAR Date: 10 November 2025 Action File Ref.: L/M. No. 33/25 in MD-PD&PS-F01-075-01A-003-P069

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Analysis

No longer in force

Marine site investigation works (vibrocores, boreholes, cone penetration tests) to be carried out at Cheung Sha, Lantau Island in an area bounded by four positions and the adjacent shoreline. Works by jack-up barges, flat-top barge, dumb lighter and two tugs; 50 m working area around each barge/lighter with yellow marker buoys and flashing lights. Hours of work 0700-1900 daily; no works on Sundays and public holidays. Notice effective immediately for approximately six months from issuance.

Type: Survey operations · severity moderate
Feed: Survey operationsAll warnings of this kind on the map, or as an API feed.
Location: Cheung Sha, Lantau Island (area bounded by four positions and adjacent shoreline)
Validity: From 10 Nov 2025, 00:00 UTC
Until 10 May 2026, 00:00 UTCWith immediate effect and for a period of approximately six months. Hours of work from 0700 to 1900 hours. No works on Sundays and public holidays.
Activity periods: ? - ? (Daily 0700-1900 hours (hours given in notice; local time not specified). No works on Sundays and public holidays.)
Hazards: marine site investigation, anchored jack-up barges and barges, marker buoys with flashing lights, tugboat operations, restricted working area

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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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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