Underwater operations in progress until 31 dec by vessel in vicinity 34-33-18.9N 121-15-41.0E
Yellow Sea · HYDROPAC 2641/15
What this record establishes
Archived notice · 2016-01-01 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 592/15 120841Z AUG 15.. Issued 2015-08-12 09:39Z. 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
- Yellow Sea. The parsed report position is 34.555, 121.261. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
- issued
- 2015-08-12 09:39Z
- status
- Archived notice
- authority
- NAVAREA XI 592/15 120841Z AUG 15.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Yellow Sea
- position
- 34.555, 121.261
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
YELLOW SEA. DNC 23. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 31 DEC BY VESSEL IN VICINITY 34-33-18.9N 121-15-41.0E. 500 METER BERTH REQUESTED. 2. CANCEL THIS MSG 01 JAN 16.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- 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.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- 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
6 within 180 nm since 2001 · 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 30 sep by M/V towing 8500 meter long cable in area bound by 34-13-04N…2012-08-17
- Survey operations in progress until 30 sep by vessel towing 8000 meter long cable in area bound by 35-22N…2010-08-17
- Survey operations in progress until 30 nov by vessel towing 5000 meter long cable in area bound by 36-04.8N…2006-10-27
- Underwater operations 07 thru 13 oct by M/V kan 407 vicinity 33-58-38.8N 123-21-14.2E2002-10-02
- Survey operations in progress until 17 oct by M/V geo arctic towing 3000 meter long cable in area bound by…2001-09-07
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 14:21Z; 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.