Exercises

Hazardous operations

North Pacific Ocean · NAVAREA XII 435/10

What this record establishes

Archived notice · 2010-10-28 16:07Z

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) · WESTERN RANGE OP W4029 201520Z OCT 10.. Issued 2010-10-26 13:51Z. 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

Current notices and reporting history in the North Pacific Ocean →

Activity windows · 4 in this warning

opens (UTC)closes (UTC)locallength
2010-10-30 01:49Z2010-10-30 03:21Z—1 h 32
2010-10-31 01:49Z2010-10-31 03:21Z—1 h 32
2010-11-01 01:49Z2010-11-01 03:21Z—1 h 32
2010-11-02 01:49Z2010-11-02 03:21Z—1 h 32

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued
2010-10-26 13:51Z
status
Archived notice
self-cancels
2010-11-02 04:21Z
authority
WESTERN RANGE OP W4029 201520Z OCT 10.
NAVAREA
NAVAREA XII
issued by
WESTERN RANGE OP
sea
North Pacific Ocean
position
16.068, -125.269
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH PACIFIC.
HAZARDOUS OPERATIONS.
1. HAZARDOUS OPERATIONS 0149Z TO 0321Z DAILY
   30 OCT THRU 02 NOV IN AREAS BOUND BY:
   A. 34-29N 120-40W, 34-31N 120-46W,
      34-46N 120-41W, 34-44N 120-34W.
   B. 34-07N 120-58W, 34-26N 120-52W,
      34-22N 120-36W, 34-03N 120-43W.
   C. 13-16N 126-14W, 17-32N 125-20W,
      17-24N 124-40W, 13-08N 125-34W.
2. CANCEL THIS MSG 020421Z NOV.

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.

All warning terms →

Collected reports in this area · military exercises

33 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
05
10
15
18

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

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 00:46Z; 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.