Gunnery exercises 2300Z to 0900Z commencing daily 31 dec thru 30 jan 10 in area bound by 27-55-15N…
North Pacific Ocean · HYDROPAC 2430/09
What this record establishes
Archived notice · 2010-01-31 10:00Z
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 869/09 27 DEC 09.. Issued 2009-12-27 09:52Z. 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.
Related notices and cancellation links
- Two derelict barges adrift in 04-59.5N 106-15.5Ecancelled by this notice
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 31 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2009-12-31 23:00Z | 2010-01-01 09:00Z | — | 10 h |
| 2010-01-01 23:00Z | 2010-01-02 09:00Z | — | 10 h |
| 2010-01-02 23:00Z | 2010-01-03 09:00Z | — | 10 h |
| 2010-01-03 23:00Z | 2010-01-04 09:00Z | — | 10 h |
| 2010-01-04 23:00Z | 2010-01-05 09:00Z | — | 10 h |
| 2010-01-05 23:00Z | 2010-01-06 09:00Z | — | 10 h |
| 2010-01-06 23:00Z | 2010-01-07 09:00Z | — | 10 h |
| 2010-01-07 23:00Z | 2010-01-08 09:00Z | — | 10 h |
| … 23 more | |||
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2009-12-27 09:52Z
- status
- Archived notice
- self-cancels
- 2010-01-31 10:00Z
- authority
- NAVAREA XI 869/09 27 DEC 09.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- North Pacific Ocean
- position
- 26.584, 146.193
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. GUNNERY EXERCISES 2300Z TO 0900Z COMMENCING DAILY 31 DEC THRU 30 JAN 10 IN AREA BOUND BY 27-55-15N 144-57-48E, 28-15-15N 146-29-47E, 25-25-16N 147-37-47E, 25-00-16N 145-35-48E. 2. CANCEL HYDROPAC 2426/09(71,93). 3. CANCEL THIS MSG 311000Z JAN 10.
Reading this warning
- Gunnery and live firing
- Naval or coastal guns firing into a sea area for practice, at stated times.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
- 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
248 within 180 nm since 2000 · 9 in the last 12 months · 2 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.
- Gunnery exercises 2300Z to 0900Z daily 30 sep thru 30 oct in area bound by 28-15.25N 146-29.78E, 25-25.27N…2026-09-26
- 2300Z to 0900Z commencing daily 30 sep to 30 oct2026-09-26
- Gunnery exercises 2300Z to 0900Z daily 31 aug thru 29 sep in area bound by 28-15.15N 146-29.47E, 25-25.16N…2026-08-27
- 2300Z to 0900Z commencing daily 31 aug to 29 sep2026-08-27
- Gunnery exercises 2300Z to 0900Z daily 31 jul thru 30 aug in area bound by 28-15.25N 146-29.78E, 25-25.27N…2026-07-27
- 2300Z to 0900Z commencing daily 31 jul to 30 aug2026-07-27
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
Worldwide in the collected sources
28 military exercises listed in force · see all
Record snapshot 2026-10-01 23:36Z; 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.