Underwater operations 21 apr thru 20 jul by M/V nan hai 5 within one mile of 29-07.5N 124-55.6E
Eastern China Sea · HYDROPAC 701/04
What this record establishes
Archived notice · 2004-07-21 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 178/04 20 APR 04. Issued 2004-04-20 12:45Z. 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
- Eastern China Sea. The parsed report position is 29.125, 124.927 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.
Current notices and reporting history in the Eastern China Sea →
- issued
- 2004-04-20 12:45Z
- status
- Archived notice
- authority
- NAVAREA XI 178/04 20 APR 04
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Eastern China Sea
- position
- 29.125, 124.927 · r 1.0 nm
- vessel
- M/V NAN HAI 5
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS 21 APR THRU 20 JUL BY M/V NAN HAI 5 WITHIN ONE MILE OF 29-07.5N 124-55.6E. 2. CANCEL THIS MSG 21 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
6 within 180 nm since 2002 · 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 in area bound by 29-27N 123-06E, 28-42N 123-37E, 27-48N 123-10E,…2005-09-20
- Survey operations in progress until 30 oct by working vessel in area bound by 29-19-35.6N 125-00-19.0E,…2005-08-08
- Survey operations 20 aug thru 30 sep by M/V geco emerald towing 4500 meter long cable in area bound by…2002-08-17
- Underwater salvage operations 25 jun until further notice by vessels with submersibles vicinity 29-13N 125-25E2002-06-22
- Underwater research operations 01 may until further notice vicinity 29-13.1N 125-24.9E2002-04-29
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
55 survey operations listed in force · see all
Record snapshot 2026-10-02 02:39Z; 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.