Underwater operations 22 thru 31 aug by M/V yokosuka with submersible within two miles of: a. 12-56.3N…
Philippine Sea · HYDROPAC 1667/10
What this record establishes
Archived notice · 2010-09-01 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 607/10 170739Z AUG 10.. Issued 2010-08-17 08:14Z. 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
- Philippine Sea. The parsed report position is 12.937, 143.633. 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 Philippine Sea →
- issued
- 2010-08-17 08:14Z
- status
- Archived notice
- authority
- NAVAREA XI 607/10 170739Z AUG 10.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Philippine Sea
- position
- 12.937, 143.633
- vessel
- M/V YOKOSUKA · 99 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTH PACIFIC. 1. UNDERWATER OPERATIONS 22 THRU 31 AUG BY M/V YOKOSUKA WITH SUBMERSIBLE WITHIN TWO MILES OF: A. 12-56.3N 143-37.9E. B. 12-57.2N 143-37.2E. C. 12-55.1N 143-38.9E. 2. CANCEL THIS MSG 01 SEP.
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
19 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.
- Underwater operations in progress until 161359Z feb by M/V thompson in area bound by 15-15.46N 146-05.22E,…2025-02-05
- Underwater operations 29 jul thru 11 aug by M/V yokosuka with submersible shinkai 6500 in areas bound by: a.…2023-07-28
- Underwater operations 2200Z to 0800Z daily 12 and 14 jun in area bound by 13-27.75N 144-37.58E, 13-27.22N…2023-06-09
- Underwater operations 2200Z to 0800Z daily 12 thru 18 may in 13-29.50N 144-40.67E2023-05-03
- Underwater operations 2300Z to 0600Z daily 10 thru 12 apr in 13-16.20N 144-22.80E2023-04-05
- Survey operations 2100Z to 0800Z daily 09, 11 and 13 apr in 13-16.20N 144-22.80E2023-04-05
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
- Uscg remote communication facility guam 13-29.00N 144-50.00E broadcast and communication services unreliableNav aids · 77.4 nm
- Guam hf NAVTEX station, V, 13-29.0N 144-50.0E, off airNav aids · 77.4 nm
- Due to tropical storm bavi: 1. the following port(s) are closed: a. rota island 14-08.35N 145-08.09EStorms · 115.4 nm
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-04 04:38Z; 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.