Underwater ordance detonations 261700Z to 262300Z aug within ten miles of trackline between 21-30.0N…
Philippine Sea · HYDROPAC 1366/01
What this record establishes
Archived notice · 2001-08-27 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) · CTU 70.5.8 201300Z AUG 01. Issued 2001-08-21 13:31Z. 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
- Philippine 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.
Current notices and reporting history in the Philippine Sea →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2001-08-26 17:00Z | 2001-08-26 23:00Z | — | 6 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2001-08-21 13:31Z
- status
- Archived notice
- self-cancels
- 2001-08-27 00:01Z
- authority
- CTU 70.5.8 201300Z AUG 01
- issued by
- CTU
- sea
- Philippine Sea
- position
- 21.596, 123.542
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER ORDANCE DETONATIONS 261700Z TO 262300Z AUG WITHIN TEN MILES OF TRACKLINE BETWEEN 21-30.0N 122-05.0E AND 21-41.5N 125-00.0E. 2. CANCEL THIS MSG 270001Z AUG.
Reading this warning
- 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.
- Track line joining
- Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
- 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
4 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.
- Ordnance drop exercises: a. 221230Z to 221330Z sep within five miles of 16-06N 119-19E2003-09-22
- Underwater ordnance detonations 052200Z to 061200Z mar, alternate 062200Z to 071200Z mar within ten miles of…2003-03-03
- Underwater ordnance detonations 270700Z to 270800Z nov within ten miles of 21-00N 122-30E2002-11-26
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 2026-10-02 02:24Z; 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.