Hazardous operations 2300Z to 0200Z commencing daily 22 thru 24 dec and 0400Z to 0700Z daily 23 thru 25 dec…
Japan Sea · HYDROPAC 2377/09
What this record establishes
Archived notice · 2009-12-25 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 846/09 180733Z DEC 09.. Issued 2009-12-18 08:18Z. 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 |
|---|---|---|---|
| 2009-12-22 23:00Z | 2009-12-23 02:00Z | — | 3 h |
| 2009-12-23 04:00Z | 2009-12-23 07:00Z | — | 3 h |
| 2009-12-23 23:00Z | 2009-12-24 02:00Z | — | 3 h |
| 2009-12-24 04:00Z | 2009-12-24 07:00Z | — | 3 h |
| 2009-12-24 23:00Z | 2009-12-25 02:00Z | — | 3 h |
| 2009-12-25 04:00Z | 2009-12-25 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
- 2009-12-18 08:18Z
- status
- Archived notice
- self-cancels
- 2009-12-25 08:00Z
- authority
- NAVAREA XI 846/09 180733Z DEC 09.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Japan Sea
- position
- 42.413, 131.932
- 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 22 THRU 24 DEC AND 0400Z TO 0700Z DAILY 23 THRU 25 DEC IN AREA BOUND BY 42-05N 131-42E, 42-17N 131-03E, 42-30N 131-03E, 42-46N 131-50E, 42-45N 132-37E, 42-05N 132-37E. 2. CANCEL THIS MSG 250800Z DEC.
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
238 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
28 military exercises listed in force · see all
Record snapshot 2026-10-02 06:10Z; 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.