Underwater ordnance detonations 0001Z to 2359Z daily 17 thru 20 mar in area bound by 34-31.9N 127-50.7E,…
Japan Sea · HYDROPAC 539/09
What this record establishes
Archived notice · 2009-03-21 00:59Z
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 251325Z FEB 09.. Issued 2009-03-14 10:08Z. 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 map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
Activity windows · 4 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2009-03-17 00:01Z | 2009-03-17 23:59Z | — | 23 h 58 |
| 2009-03-18 00:01Z | 2009-03-18 23:59Z | — | 23 h 58 |
| 2009-03-19 00:01Z | 2009-03-19 23:59Z | — | 23 h 58 |
| 2009-03-20 00:01Z | 2009-03-20 23:59Z | — | 23 h 58 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2009-03-14 10:08Z
- status
- Archived notice
- self-cancels
- 2009-03-21 00:59Z
- authority
- COMSEVENTHFLT 251325Z FEB 09.
- issued by
- COMSEVENTHFLT
- sea
- Japan Sea
- position
- 34.490, 127.910
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER ORDNANCE DETONATIONS 0001Z TO 2359Z DAILY 17 THRU 20 MAR IN AREA BOUND BY 34-31.9N 127-50.7E, 34-32.9N 127-53.3E, 34-29.1N 127-59.5E, 34-25.5N 127-56.0E, 34-29.7N 127-50.4E. 2. CANCEL HYDROPAC 538/09. 3. CANCEL THIS MSG 210059Z 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.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
- 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.
Collected reports in this area · ordnance operations
29 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 192200Z to 230830Z mar in area bound by 34-34.33N 125-32.18E, 34-13.92N…2012-03-20
- Underwater ordnance detonations 052200Z to 060830Z mar within one mile of: a. 36-09-11.71N 129-26-42.31E2011-03-05
- 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 0001Z to 1300Z daily: a. 07 may in area bound by 26-07N 122-35E, 25-45N…2003-05-06
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 18:43Z; 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.