Underwater operations in progress until 25 may by M/V hai yang shi you 941 within one mile of 21-48-46N…
South China Sea · HYDROPAC 1315/13
What this record establishes
Archived notice · 2013-05-26 00:01Z
This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA XI 337/13 080928Z MAY 13.. Issued 2013-05-08 13:55Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- South China Sea. The parsed report position is 21.813, 116.021 with a 1.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- 16 meter S/V steven, one person on board, overdue to gambier islands (23-08S 134-56W)cancelled by this notice
Current notices and reporting history in the South China Sea →
- issued
- 2013-05-08 13:55Z
- status
- Archived notice
- authority
- NAVAREA XI 337/13 080928Z MAY 13.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- South China Sea
- position
- 21.813, 116.021 · r 1.0 nm
- vessel
- M/V HAI YANG SHI YOU 941
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTHERN SOUTH CHINA SEA. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 25 MAY BY M/V HAI YANG SHI YOU 941 WITHIN ONE MILE OF 21-48-46N 116-01-14E. 2. CANCEL HYDROPAC 1277/13(83). 3. CANCEL THIS MSG 26 MAY 13.
Reading this warning
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- Position (degrees and minutes)
- How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · survey operations
14 within 180 nm since 2012 · 0 in the last 12 months · 0 listed in force now
Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.
- Survey operations in progress until 14 sep by M/V sw vespucci towing five mile long cable in area bound by…2019-08-05
- Survey operations 28 sep thru 01 oct by M/V pgs apollo towing ten five mile long cables in area bound by…2017-09-27
- Survey operations in progress until further notice by M/V pgs apollo towing ten five mile long cables in…2017-09-13
- Survey operations in progress until 112200Z sep by M/V pgs apollo towing ten five mile long cables in area…2017-09-10
- Survey operations in progress until further notice by M/V pgs apollo towing ten five mile long cables in…2017-08-27
- Survey operations in progress until further notice by M/V pgs apollo towing ten five mile long cables in…2017-08-20
Month of issue in the collected archive
All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.
Nearby notices listed in force · within 120 nm
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-03 03:42Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.