MDN 61/2026

Received: 30 Mar 2026, 00:00Updated: 14 Nov 2026, 12:50

analysis

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Marine site investigation (borehole drilling) in Deep Bay, jack-up barges and silt curtains

Marine site investigation works involving drilling of boreholes are taking place in Deep Bay within the area bounded by five specified WGS84 coordinates. Four jack-up barges, one tugboat and one work boat will carry out the works; a working area of approximately 15 metres around each jack-up barge will be established. Works are carried out from 0800 to 1800 hours, no works on Sundays and public holidays; silt curtains and yellow marker buoys with yellow flashing lights will mark the works. This Notice supersedes Marine Department Notice No. 38/2026.

Type: Survey operations · severity moderate
Feed: Survey operationsAll warnings of this kind on the map (contributors), or as an API feed: /api/v2/feeds/survey/
Location: Deep Bay
Validity: From 30 Mar 2026, 00:00 UTC
With immediate effect and for a period of approximately 10 months
Activity periods: ? - ? (Daily 0800-1800 UTC (times given as hours of work); no works on Sundays and public holidays, from immediate effect for approx. 10 months)
Hazards: marine site investigation, jack-up barges, silt curtains, marker buoys with flashing lights, restricted working area (15 metres)
Cancels: MDN 38/2026

Generated automatically from the warning text on 30 Sept 2026, 11:18 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

Geometry refsbounded, circle_radius, polygon
Geometry phrasesarea bounded, bounded by, within

Message content

MARINE DEPARTMENT NOTICE NO. 61/2026 (Marine Works) Marine Site Investigation at Deep Bay With immediate effect and for a period of approximately 10 months, marine site investigation works involving drilling of boreholes will be carried out within the area bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (A) to (E): (A) 22-27.93N 113-58.82E (B) 22-28.01N 113-58.71E (C) 22-28.95N 113-57.63E (D) 22-29.10N 113-57.82E (E) 22-28.13N 113-58.90E 2. The works will be carried out by four jack-up barges. One tugboat and one work 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 15 metres around each jack-up barge will be established. 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 0800 to 1800 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. Silt curtains, which are large pieces of netting to contain mud and sediments extending from the sea surface to the seabed, will be established at the works locations. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the extent of the silt curtains. 6. Vessels navigating in the vicinity should proceed with caution. 7. A drawing showing the works area is attached to this Notice. This Notice supersedes Marine Department Notice No. 38/2026. Mr. S.F. WONG Director of Marine Marine Department Government of the HKSAR Date: 30 March 2026 Action File Ref.: L/M. No. 45/25 in MD-PD&PS-F01-075-01A-003-P072

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