Underwater ordnance detonations 052200Z to 060830Z mar within one mile of: a. 36-09-11.71N 129-26-42.31E
Japan Sea · HYDROPAC 704/11
What this record establishes
Archived notice · 2011-03-06 09:30Z
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) · COMSEVENTHFLT 031158Z MAR 11.. Issued 2011-03-05 11:06Z. 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
- Japan Sea. The parsed report position is 35.494, 129.109. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2011-03-05 22:00Z | 2011-03-06 08:30Z | — | 10 h 30 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2011-03-05 11:06Z
- status
- Archived notice
- self-cancels
- 2011-03-06 09:30Z
- authority
- COMSEVENTHFLT 031158Z MAR 11.
- issued by
- COMSEVENTHFLT
- sea
- Japan Sea
- position
- 35.494, 129.109
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SOUTH KOREA-SOUTHEAST COAST. ORDNANCE. 1. UNDERWATER ORDNANCE DETONATIONS 052200Z TO 060830Z MAR WITHIN ONE MILE OF: A. 36-09-11.71N 129-26-42.31E. B. 34-50-04.52N 128-46-22.39E. 2. CANCEL THIS MSG 060930Z MAR.
Reading this warning
- Unexploded ordnance
- Bombs, shells, mines or torpedoes found on the seabed or washed up, and the operations to remove or destroy them.
- Date-time group (DTG)
- A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
- 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 · ordnance operations
21 within 180 nm since 1999 · 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 ordnance detonations 0001Z to 2359Z daily 17 thru 20 mar in area bound by 34-31.9N 127-50.7E,…2009-03-14
- Underwater ordnance detonations 0001Z to 2359Z daily 16 thru 20 mar in area bound by 34-58.2N 128-44.5E,…2009-03-14
- Underwater ordnance detonations 0001Z to 0800Z daily 02 thru 06 mar in areas bound by: a. 36-06.70N…2008-02-26
- Underwater ordnance detonations 2200Z to 1000Z commencing daily 23 and 24 mar within 0.5 miles of 36-01.4N…2004-03-20
- Underwater ordnance detonations 212200Z to 221000Z and 222200Z to 231000Z mar within 0.5 miles of 36-01.4N…2003-03-17
- Underwater ordnance detonations 212200Z to 251000Z mar within 0.5 miles of: a. 36-02.9N 129-29.3E2003-03-17
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
0 ordnance operations listed in force · see all
Record snapshot 2026-10-01 18:40Z; source collection times vary.
Ordnance
Ordnance disposal, underwater detonations and unexploded ordnance. All current ordnance 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.