Hazardous operations 2300Z to 0200Z commencing daily 15 thru 17 sep and 0400Z to 0700Z daily 16 thru 18 sep…
Japan Sea · HYDROPAC 1769/08
What this record establishes
Archived notice · 2008-09-18 08:00Z
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) · NAVAREA XI 504/08 11 SEP 08.. Issued 2008-09-11 09:37Z. 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.
Activity windows · 6 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2008-09-15 23:00Z | 2008-09-16 02:00Z | — | 3 h |
| 2008-09-16 04:00Z | 2008-09-16 07:00Z | — | 3 h |
| 2008-09-16 23:00Z | 2008-09-17 02:00Z | — | 3 h |
| 2008-09-17 04:00Z | 2008-09-17 07:00Z | — | 3 h |
| 2008-09-17 23:00Z | 2008-09-18 02:00Z | — | 3 h |
| 2008-09-18 04:00Z | 2008-09-18 07:00Z | — | 3 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2008-09-11 09:37Z
- status
- Archived notice
- self-cancels
- 2008-09-18 08:00Z
- authority
- NAVAREA XI 504/08 11 SEP 08.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Japan Sea
- position
- 42.112, 134.501
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. HAZARDOUS OPERATIONS 2300Z TO 0200Z COMMENCING DAILY 15 THRU 17 SEP AND 0400Z TO 0700Z DAILY 16 THRU 18 SEP IN AREA BOUND BY 40-49.0N 134-54.0E, 40-58.0N 134-17.0E, 42-22.5N 131-15.0E, 42-41.0N 131-18.5E, 42-41.0N 133-31.5E, 43-40.0N 136-06.0E, 42-00.0N 136-31.5E, 40-48.0N 135-58.0E. 2. CANCEL THIS MSG 180800Z SEP.
Reading this warning
- Hazardous operations
- NGA's heading for activities that make an area dangerous — most often rocket launches, space debris and weapons firings, and some open-ended danger areas.
- 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.
- 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 · military exercises
241 within 180 nm since 1999 · 3 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.
- 2200Z to 1000Z commencing daily 31 jul, 02 to 14, 16 to 21, 23 to 28 and 30 aug2026-07-27
- Gunnery exercises 2200Z to 1000Z daily, 31 jul, 02 thru 14, 16 thru 21, 23 thru 28 and 30 aug, in area bound…2026-07-27
- Gunnery exercises 2200Z to 0800Z daily 11 thru 16, 18 thru 23 and 25 thru 30 jan in area bound by 42-40.00N…2026-01-07
- Gunnery exercises 2200Z to 1000Z daily 11 thru 13, 15 thru 20, 22 thru 29 jun in area bound by 42-40.00N…2025-06-12
- Gunnery exercises 2200Z to 0800Z daily 31 jan thru 27 feb except saturdays in area bound by 42-40.00N…2025-01-29
- Gunnery exercises 2200Z to 0800Z daily 01, 02, 05 thru 07, 12 thru 17, 19 thru 24 and 26 thru 30 may in area…2024-04-27
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
9 military exercises listed in force · see all
Record snapshot 2026-10-03 19:53Z; source collection times vary.
Exercises
Gunnery, firing and naval exercise areas. All current military exercises →
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.