MDN 179/2024

SÉCURITÉ

Artificial reef deployment west of Hong Kong International Airport, 15-month works

No longer in forceReceived 04 Oct 2024, 00:00 UTCArchived 30 Sept 2026, 12:45 UTC

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MARINE DEPARTMENT NOTICE NO. 179/2024 (Marine Works) Deployment of Artificial Reefs to the West of the Hong Kong International Airport With immediate effect and for a period of approximately 15 months, artificial reefs will be established on the seabed within the area bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (A) to (D): (A) 22-18.60N 113-53.17E (B) 22-18.34N 113-53.26E (C) 22-18.26N 113-52.98E (D) 22-18.51N 113-52.89E 2. The artificial reef is cylindrical in shape with a height of about 1.2 metre and a base of about 1.3 metre in diameter. There will be a vertical clearance of about 4.5 metres from the top of the artificial reef to sea level. 3. The works will be carried out by one dumb lighter and one tugboat. Another dumb lighter, one crane barge and one work boat will provide assistance. Vessels engaged in the works will display signals as prescribed in international and local regulations. 4. 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. 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. Diving operations will be carried out from time to time during the hours of work. 7. Vessels navigating in the vicinity should proceed with caution and keep clear of the works area at slow speed, bearing in mind that there are divers working in the area. 8. 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: 4 October 2024 Action File Ref.: L/M No. 27/24 in MD-PD&PS-F01-075-01A-003-P059

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Analysis

No longer in force

Cancelled by MDN 59/2026 (archived)

Artificial reefs are being deployed on the seabed to the west of Hong Kong International Airport within a small area defined by four positions. Cylindrical reef units about 1.2 m high and 1.3 m diameter will leave about 4.5 m vertical clearance to sea level. Works (dumb lighters, tug, crane barge, work boat) and occasional diving will take place mainly 0700-1900 daily (no works on Sundays and public holidays). A 50 metre working area with yellow marker buoys and yellow flashing lights around anchors will be established; vessels should keep clear and proceed with caution.

Type: Offshore operations · severity moderate
Feed: Offshore works, rigs and towingAll warnings of this kind on the map, or as an API feed.
Location: West of the Hong Kong International Airport
Validity: From 04 Oct 2024, 00:00 UTC
Until 04 Jan 2026, 00:00 UTCWith immediate effect and for a period of approximately 15 months. Hours of work from 0700 to 1900 hours. No works on Sundays and public holidays.
Activity periods: ? - ? (Daily 0700-1900 (times given as local in notice; treated as UTC here), no works on Sundays and public holidays; diving carried out from time to time during hours of work.)
Hazards: artificial reefs (submerged obstructions), diving operations, anchored/working vessels and gear

Worked out automatically from the warning text on 30 Sept 2026, 12:21 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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Keywordsdiving operations divers working keep clear of

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