Exercises

Gunnery exercises daily 2300-0900 Zulu, July 31 to August 30, North Pacific area bounded by 28-15N 146-30E, 25-25N 147-38E, 25-00N 145-36E, 27-55N 145-58E.

North Pacific Ocean · HYDROPAC 2152/26

What this record establishes

Cancelled notice · 2026-09-08 17:45Z

This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.

Source and dates
NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-07-27 12:02Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-08-31 19:32Z. 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.

Current notices and reporting history in the North Pacific Ocean →

Activity windows · 31 in this warning

opens (UTC)closes (UTC)locallength
2026-07-31 23:00Z2026-08-01 09:00Z—10 h
2026-08-01 23:00Z2026-08-02 09:00Z—10 h
2026-08-02 23:00Z2026-08-03 09:00Z—10 h
2026-08-03 23:00Z2026-08-04 09:00Z—10 h
2026-08-04 23:00Z2026-08-05 09:00Z—10 h
2026-08-05 23:00Z2026-08-06 09:00Z—10 h
2026-08-06 23:00Z2026-08-07 09:00Z—10 h
2026-08-07 23:00Z2026-08-08 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
2026-07-27 12:02Z
status
Cancelled notice
self-cancels
2026-08-31 10:00Z
sea
North Pacific Ocean
position
26.584, 146.193
nearest port
Yokosuka · 622 nm
source
NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-08-17 13:41Z

Original warning text

NORTH PACIFIC.
1. GUNNERY EXERCISES 2300Z TO 0900Z DAILY
   31 JUL THRU 30 AUG IN AREA BOUND BY
   28-15.25N 146-29.78E, 25-25.27N 147-37.78E,
   25-00.26N 145-35.80E, 27-55.25N 144-57.80E.
2. CANCEL THIS MSG 311000Z AUG 26.

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.
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.

All warning terms →

Collected reports in this area · military exercises

247 within 180 nm since 2000 · 8 in the last 12 months · 3 listed in force now

00
05
10
15
20
25
26

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.

Month of issue in the collected archive

J
F
M
A
M
J
J
A
S
O
N
D

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

32 military exercises listed in force · see all

Record snapshot 2026-09-28 09:05Z; 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.