MDN 59/2026

SÉCURITÉ

Deployment of artificial reefs west of Hong Kong International Airport, approx four months

No longer in forceReceived 27 Mar 2026, 00:00 UTCArchived 30 Sept 2026, 12:45 UTC

Warning text

Positions open on the map

MARINE DEPARTMENT NOTICE NO. 59/2026 (Marine Works) Deployment of Artificial Reefs to the West of the Hong Kong International Airport With immediate effect and for a period of approximately four 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 work boat. One guard 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. 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. 7. A drawing showing the works area is attached to this Notice. This Notice supersedes Marine Department Notice No. 179/2024. Mr. S.F. WONG Director of Marine Marine Department Government of the HKSAR Date: 25 March 2026 Action File Ref.: L/M No. 27/24 in MD-PD&PS-F01-075-01A-003-P059

Location map

Open on the full map

Analysis

No longer in force

Artificial reefs will be deployed on the seabed to the west of Hong Kong International Airport within a small area bounded by four coordinates. The reefs are cylindrical (about 1.2 m high, 1.3 m diameter) with about 4.5 m vertical clearance to sea level. Works by one work boat with one guard boat and marker buoys will establish a 50 m working area; diving will occur during working hours. Work hours are 0700-1900 daily, no works on Sundays and public holidays.

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 Hong Kong International Airport
Validity: From 25 Mar 2026, 00:00 UTC
Until 25 Jul 2026, 00:00 UTCWith immediate effect and for a period of approximately four months
Activity periods: 25 Mar 2026, 07:00 UTC - 25 Jul 2026, 19:00 UTC (work hours daily 0700-1900 UTC; no works on Sundays and public holidays)
Hazards: artificial reefs on seabed, diving operations, work vessels and guard boat, marker buoys and anchor lines
Cancels: MDN 179/2024

Worked out automatically from the warning text on 30 Sept 2026, 11:18 UTC. It can be wrong: the official warning text is the authority.

The whole analysis comes with Lagom

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.

See the plans

Keywordsdiving operations divers working keep clear of

Back to Hong Kong