Underwater operations in progress until 30 jul within two miles of 25-13-21N 120-04-18E
South China Sea · HYDROPAC 840/00
What this record establishes
Archived notice · 2000-07-31 00:00Z
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 317/00 060805Z JUN 00. Issued 2000-06-06 09:29Z. 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 25.223, 120.072 with a 2.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Current notices and reporting history in the South China Sea →
- issued
- 2000-06-06 09:29Z
- status
- Archived notice
- authority
- NAVAREA XI 317/00 060805Z JUN 00
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- South China Sea
- position
- 25.223, 120.072 · r 2.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 30 JUL WITHIN TWO MILES OF 25-13-21N 120-04-18E. 2. CANCEL THIS MSG 31 JUL.
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.
- 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
11 within 180 nm since 2000 · 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 26 oct by M/V pgs apollo towing ten five mile long cables in area bound…2017-09-16
- Survey operations in progress until further notice by M/V pgs apollo towing ten five mile long cables in…2017-09-03
- Cancel HYDROPAC 2911/172017-08-29
- Survey operations in progress until 21 jun by M/V pgs apollo towing ten 8100 meter long cables in area bound…2017-06-06
- Survey operations in progress until 06 jun by M/V pgs apollo towing ten 8100 meter long cables in area bound…2017-06-01
- Survey operations 11 thru 30 may by M/V pgs apollo towing ten 8100 meter long cables in area bound by…2017-05-09
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 2026-10-02 19:01Z; 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.