MDN 255/2025

Low-altitude drone operations east of Crooked Island for ~six months

No longer in forceReceived 16 Dec 2025, 00:00 UTCArchived 30 Sept 2026, 12:45 UTC

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MARINE DEPARTMENT NOTICE NO. 255/2025 (Navigation Warnings & Related Information) Drone Operations at the waters off Crooked Island With immediate effect and for a period of approximately six months, low altitude drone operations will be conducted over the waters east of Crooked Island. 2. The operating area at the waters east of Crooked Island is formed with straight lines joining the following co-ordinates (WGS 84 Datum) from (A) to (F): Latitude Longitude (A) 22-33.36N 114-21.53E (B) 22-31.81N 114-22.12E (C) 22-30.47N 114-21.41E (D) 22-29.68N 114-20.24E (E) 22-32.03N 114-18.06E (F) 22-32.61N 114-18.04E 3. During the aforementioned period, masters, coxswains and persons-in- charge of all vessels navigating in the vicinity should be aware of the said operations and navigate with caution. 4. A drawing showing the operating area is attached to this Notice. Mr. S.F. WONG Director of Marine Marine Department Government of the HKSAR Date: 16 December 2025 Action File Ref.: L/M. No. 1376/25 in MD-HPS-F01-015-04B-002

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Analysis

No longer in force

Low-altitude drone operations will be conducted over waters east of Crooked Island. The operating area is defined by a polygon joining six WGS84 positions (A to F). The operations commenced with immediate effect on 16 December 2025 for approximately six months. Mariners are advised to be aware of the operations and navigate with caution.

Type: Survey operations · severity moderate
Feed: Survey operationsAll warnings of this kind on the map, or as an API feed.
Location: Waters east of Crooked Island
Validity: From 16 Dec 2025, 00:00 UTC
Until 16 Jun 2026, 00:00 UTCWith immediate effect and for a period of approximately six months
Activity periods: 16 Dec 2025, 00:00 UTC - 16 Jun 2026, 00:00 UTC (With immediate effect and for a period of approximately six months)
Hazards: low-altitude drone operations

Worked out automatically from the warning text on 30 Sept 2026, 11:37 UTC. It can be wrong: the official warning text is the authority.

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