MDN 191/2026

SÉCURITÉ

Temporary acoustic monitors for marine mammal survey at Lamma Island

ActiveReceived 15 Oct 2026, 00:00 UTC

Warning text

Positions open on the map

MARINE DEPARTMENT NOTICE NO. 191/2026 (Marine Works) Temporary Establishment of Acoustic Monitors for Marine Mammal Survey at Lamma Island With immediate effect and for a period of approximately 14 months, acoustic monitors will be temporarily established at the following locations (WGS 84 Datum): (A) 22-13.29N 114-08.15E (B) 22-12.59N 114-07.82E (C) 22-10.85N 114-08.91E 2. The acoustic monitors will be laid at the co-ordinates from (A) to (C). The acoustic monitor is an instrument for collecting marine mammal data. It will be fixed to a gravity anchor on the seabed. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the positions of the three acoustic monitors. 3. Laying of the monitors will be carried out by a work boat and a working area of approximately 10 metres around the work boat will be established. One guard boat will provide assistance. Vessels engaged in the works will display signals as prescribed in international and local regulations. 4. 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 not stay in the works locations outside the hours of work. 5. Diving operations for retrieving data from the monitors will be carried out by the work boat in the above locations from time to time. Vessels navigating in the vicinity should proceed with caution and keep clear of the works locations at slow speed, bearing in mind that there are diving operations in the locations, and the water depths above these acoustic monitors are reduced. 6. A drawing showing the locations of the monitors is attached to this Notice. Mr. S.F. WONG Director of Marine Marine Department Government of the HKSAR Date: 15 October 2026 Action File Ref.: L/M. No. 33/26 in MD-PD&PS-F01-075-01A-001A-P101

Location map

Open on the full map

Analysis

Active

Acoustic monitors to record marine mammals have been temporarily established at three positions off Lamma Island. The instruments are fixed to gravity anchors and marked by yellow marker buoys with yellow flashing lights. Work boats (plus one guard boat) will lay and service the monitors; diving for data retrieval will take place from time to time. Hours of work are 0700-1900 daily (no work on Sundays and public holidays) and the installation is for approximately 14 months from immediate effect.

Type: Survey operations · severity moderate
Feed: Survey operationsAll warnings of this kind on the map, or as an API feed.
Location: Lamma Island (positions given in notice)
Validity: From 15 Oct 2026, 00:00 UTC
With immediate effect and for a period of approximately 14 months. Hours of work will be from 0700 to 1900 hours. No works on Sundays and public holidays.
Activity periods: ? - ? (Daily 0700-1900 (hours of work); no works on Sundays and public holidays)
Hazards: acoustic monitors fixed to seabed, gravity anchors, marker buoys with yellow flashing lights, work boat and guard boat operations, diving operations, reduced water depth above monitors

Worked out automatically from the warning text on 16 Oct 2026, 04:17 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 keep clear of

Back to Hong Kong