Underwater ordnance detonations: a. 231900Z to 241900Z jul within 15 miles of 26-20.0N 125-18.0E
Eastern China Sea · HYDROPAC 1146/01
What this record establishes
Archived notice · 2001-07-21 09:53Z
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) · COMDESRON 15 250549Z JUN 01. Issued 2001-07-19 15:57Z. 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 27.000, 125.143. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel HYDROPAC 1146/01 and this msglater cancellation notice
Current notices and reporting history in the Eastern China Sea →
Activity windows · 11 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2001-07-23 19:00Z | 2001-07-24 19:00Z | — | 24 h |
| 2001-07-24 22:00Z | 2001-07-25 03:00Z | — | 5 h |
| 2001-07-26 00:01Z | 2001-07-26 05:00Z | — | 4 h 59 |
| 2001-07-26 17:00Z | 2001-07-27 14:30Z | — | 21 h 30 |
| 2001-07-28 05:00Z | 2001-07-29 10:00Z | — | 29 h |
| 2001-07-28 20:00Z | 2001-07-28 23:59Z | — | 3 h 59 |
| 2001-07-29 19:00Z | 2001-07-30 17:00Z | — | 22 h |
| 2001-07-30 22:00Z | 2001-07-31 04:00Z | — | 6 h |
| … 3 more | |||
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2001-07-19 15:57Z
- status
- Archived notice
- self-cancels
- 2001-08-01 15:00Z
- authority
- COMDESRON 15 250549Z JUN 01
- issued by
- COMDESRON
- sea
- Eastern China Sea
- position
- 27.000, 125.143
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER ORDNANCE DETONATIONS:
A. 231900Z TO 241900Z JUL WITHIN 15 MILES OF 26-20.0N 125-18.0E.
B. 242200Z TO 250300Z JUL IN AREA BOUND BY 27-12.1N 125-04.0E,
27-07.4N 124-56.6E, 27-03.8N 124-59.9E, 27-07.4N 125-04.9E,
27-04.6N 125-08.0E, 26-58.1N 124-59.5E, 27-07.4N 124-50.8E,
27-14.5N 125-01.7E, 27-12.0N 125-04.0E.
C. 260001Z TO 260500Z JUL IN AREA BOUND BY 27-05.0N 124-57.3E,
27-05.5N 125-00.9E, 26-53.3N 125-06.3E, 26-50.6N 124-48.9E,
27-03.5N 124-46.4E, 27-04.1N 124-52.2E, 26-56.2N 124-53.9E,
26-57.4N 124-59.1E, 27-05.0N 124-57.3E.
D. 261700Z TO 271430Z JUL WITHIN 15 MILES OF:
1. 27-15.8N 124-58.4E.
2. 27-36.0N 124-50.0E.
E. 280500Z TO 291000Z JUL WITHIN 15 MILES OF 27-30.0N 125-00.0E.
F. 282000Z TO 282359Z JUL IN AREA BOUND BY 27-23.3N 125-01.8E,
27-19.2N 125-02.6E, 27-16.4N 124-56.0E, 27-13.2N 124-52.7E,
27-15.0N 125-03.9N, 27-28.0N 125-03.9E, 27-24.8N 124-50.0E,
27-21.2N 124-53.8E, 27-23.3N 125-01.8E.
G. 291900Z TO 301700Z JUL WITHIN 15 MILES OF 27-16.0N 125-19.0E.
H. 302200Z TO 310400Z JUL IN AREA BOUND BY 27-05.0N 124-40.0E,
27-05.0N 125-48.0E, 27-00.0N 125-48.0E, 27-00.0N 124-20.0E,
27-05.0N 124-20.0E.
I. 302300Z TO 310800Z JUL ALONG TRACKLINE BETWEEN
27-01.0N 124-44.5E AND 27-04.6N 125-01.0E.
J. 310800Z TO 311900Z JUL ALONG TRACKLINE BETWEEN
27-01.0N 124-44.5E AND 27-16.0N 124-43.5E.
K. 311900Z JUL TO 011400Z AUG WITHIN 15 MILES OF
26-50.0N 125-05.0E.
2. CANCEL THIS MSG 011500Z AUG.
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.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- Track line joining
- Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
- 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
15 within 180 nm since 2000 · 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 1200Z daily: a. 15 sep in area between 28-10N 27-30N and 125-07E…2003-09-13
- Underwater ordnance detonations 0001Z to 1300Z daily 07 thru 12 may in areas bound by: a. 27-23N 124-44E,…2003-05-05
- Underwater ordnance detonations 252200Z to 261200Z feb, alternate 262200Z to 271200Z feb within ten miles of…2003-02-25
- Underwater ordnance detonations 280001Z to 281000Z sep in area bound by 29-58N 126-42E, 29-46N 127-14E,…2002-09-27
- Underwater ordnance detonations 260001Z to 261000Z sep, alternate 270001Z to 271000Z sep in area bound by…2002-09-25
- Underwater ordnance detonations 250001Z to 251000Z sep, alternate 270001Z to 271000Z sep in area bound by…2002-09-21
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 04:41Z; 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.