MDN 256/2025

SÉCURITÉ

Received: 16 Dec 2025, 00:00Updated: 14 Nov 2026, 12:50

analysis

Activeuntil 16 Nov 2026, 00:00 UTC (in 24 h)

Reconstruction works at Ma Wan Chung and Yi O - works areas established

Reconstruction of piers at Ma Wan Chung and Yi O with jack-up barges, dumb lighters and support vessels. Two works areas defined by given coordinates; works in progress from immediate effect for approximately 11 months. Daily works 0700-1900; no works on Sundays and public holidays. Diving operations will occur from time to time and silt curtains and marker buoys with yellow flashing lights will mark anchors and curtain extents.

Type: Offshore operations · severity moderate
Feed: Offshore works, rigs and towingAll warnings of this kind on the map (contributors), or as an API feed: /api/v2/feeds/offshore/
Location: Ma Wan Chung and Yi O, Hong Kong waters (works areas defined by coordinates in notice)
Validity: From 16 Dec 2025, 00:00 UTC
Until 16 Nov 2026, 00:00 UTCWith immediate effect and for a period of approximately 11 months. Hours of work 0700 to 1900 hours. No works on Sundays and public holidays.
Activity periods: ? - ? (Daily 0700-1900 (work hours). No works on Sundays and public holidays. Times shown as given in notice.)
Hazards: offshore construction works, jack-up barges, dumb lighters, anchors and anchor lines, silt curtains, diving operations, marker buoys with yellow flashing lights

Generated automatically from the warning text on 30 Sept 2026, 11:37 UTC. It can be wrong: the original warning below is the authoritative text.

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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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Keywords

Operationsdiving operations, divers working
Geometry refsbounded, circle_radius
Restricted Areakeep clear of
Geometry phrasesbounded by, within

Message content

MARINE DEPARTMENT NOTICE NO. 256/2025 (Marine Works) Reconstruction Works for Piers at Ma Wan Chung and Yi O With immediate effect and for a period of approximately 11 months, reconstruction works for piers at Ma Wan Chung and Yi O will be carried out in the following works areas: Works Area 1: This area is bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (A) to (K) and the adjacent shoreline: (A) 22-17.14N 113-56.12E (B) 22-17.11N 113-56.11E (C) 22-17.09N 113-56.04E (D) 22-17.16N 113-55.99E (E) 22-17.17N 113-56.03E (F) 22-17.13N 113-56.06E (G) 22-17.13N 113-56.06E (H) 22-17.14N 113-56.09E (I) 22-17.14N 113-56.10E (J) 22-17.14N 113-56.11E (K) 22-17.14N 113-56.11E Works Area 2: This area is bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (L) to (Q): (L) 22-14.37N 113-51.03E (M) 22-14.31N 113-51.14E (N) 22-14.23N 113-51.14E (O) 22-14.18N 113-51.16E (P) 22-14.14N 113-51.09E (Q) 22-14.23N 113-50.94E 2. The works will be carried out by five jack-up barges and two dumb lighters. One tug and one launch 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 working vessel will be established. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the positions of the anchors extending from each lighter. Yellow flashing lights will be installed at the four corners of each jack-up barge to indicate its position. 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 areas. 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 areas 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 areas at slow speed, bearing in mind that there are divers working in the areas. 7. Drawings showing the works areas are attached to this Notice. This Notice is an extension of Marine Department Notice No. 63/2025. Mr. S.F. WONG Director of Marine Marine Department Government of the HKSAR Date: 16 December 2025 Action File Ref.: L/M. No. 36/22 in MD-PD&PS-F01-075-01A-003-P036

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