Underwater ordnance detonations 250001Z to 270001Z jul in area bound by 38-39N 144-21E, 38-40N 145-38E,…
North Pacific Ocean · HYDROPAC 658/99
What this record establishes
Archived notice · 1999-07-27 01:01Z
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) · CTG SEVEN TWO PT FOUR 240001Z JUN 99. Issued 1999-07-21 01:15Z. 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
- North Pacific Ocean. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 1999-07-25 00:01Z | 1999-07-27 00:01Z | — | 48 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 1999-07-21 01:15Z
- status
- Archived notice
- self-cancels
- 1999-07-27 01:01Z
- authority
- CTG SEVEN TWO PT FOUR 240001Z JUN 99
- issued by
- CTG SEVEN TWO PT FOUR
- sea
- North Pacific Ocean
- position
- 38.034, 145.003
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER ORDNANCE DETONATIONS 250001Z TO 270001Z JUL IN AREA BOUND BY 38-39N 144-21E, 38-40N 145-38E, 37-28N 145-48E, 37-26N 144-14E. 2. CANCEL THIS MSG 270101Z JUL.
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.
- 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.
- 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
5 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 191501Z to 201459Z jan within 50 miles of 40-00N 144-00E2002-01-15
- Underwater ordnance detonations 0001Z to 0900Z daily 12 and 13 oct within 50 miles of 40-00N 144-00E2000-10-10
- Underwater ordnance detonations 0001Z to 0600Z daily 01 thru 06 jun within 50 miles of 40-00N 145-00E2000-05-24
- Underwater ordnance detonations in progress until 300001Z jun in area bound by 38-39N 144-21E, 38-40N…1999-06-25
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 2026-10-03 22:28Z; 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.