MDN 72/2026

Seabed reinstatement works near Butterfly Bay, Tuen Mun

No longer in forceReceived 17 Apr 2026, 00:00 UTCArchived 30 Sept 2026, 12:45 UTC

Warning text

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MARINE DEPARTMENT NOTICE NO. 72/2026 (Marine Works) Seabed Reinstatement Works near Butterfly Bay, Tuen Mun With immediate effect and for a period of approximately five months, seabed reinstatement works will be carried out in the area bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (A) to (E): (A) 22-21.43N 113-57.27E (B) 22-21.40N 113-57.35E (C) 22-21.08N 113-57.23E (D) 22-21.11N 113-57.13E (E) 22-21.32N 113-57.21E 2. The works will be carried out by one hopper barge. One tugboat and one guard boat 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 the hopper barge 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. The hours of work will be round-the-clock. Vessels navigating in the vicinity should proceed with caution. 5. A drawing showing the works area is attached to this Notice. This Notice supersedes Marine Department Notice No. 57/2026. Mr. S.F. WONG Director of Marine Marine Department Government of the HKSAR Date: 17 April 2026 Action File Ref.: L/M No. 21/25 in MD-PD&PS-F01-075-01A-003-P067

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Analysis

No longer in force

Seabed reinstatement works are underway near Butterfly Bay, Tuen Mun, carried out by a hopper barge with a tug and guard boat. A working area of about 50 metres around the hopper barge will be established with yellow marker buoys fitted with yellow flashing lights marking anchor positions. Works are round-the-clock and will last for approximately five months from immediate effect. This notice supersedes MDN 57/2026.

Type: Dredging / works · severity moderate
Feed: Offshore works, rigs and towingAll warnings of this kind on the map, or as an API feed.
Location: Butterfly Bay, Tuen Mun
Validity: From 17 Apr 2026, 00:00 UTC
Until 17 Sept 2026, 00:00 UTCWith immediate effect and for a period of approximately five months
Activity periods: 17 Apr 2026, 00:00 UTC - 17 Sept 2026, 00:00 UTC (round-the-clock (24 hours daily))
Hazards: seabed reinstatement works, hopper barge and attendant vessels, anchors and anchor lines, marker buoys with flashing lights
Cancels: MDN 57/2026

Worked out automatically from the warning text on 30 Sept 2026, 11:10 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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