Exercises

Hazardous operations

North Pacific Ocean · NAVAREA XII 213/11

What this record establishes

Archived notice · 2011-06-10 15:15Z

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 W4031 311559Z MAY 11.. Issued 2011-06-04 17:13Z. 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 · 5 in this warning

opens (UTC)closes (UTC)locallength
2011-06-09 13:50Z2011-06-09 15:25Z—1 h 35
2011-06-10 13:50Z2011-06-10 15:25Z—1 h 35
2011-06-11 13:50Z2011-06-11 15:25Z—1 h 35
2011-06-12 13:50Z2011-06-12 15:25Z—1 h 35
2011-06-13 13:50Z2011-06-13 15:25Z—1 h 35

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

issued
2011-06-04 17:13Z
status
Archived notice
self-cancels
2011-06-13 16:25Z
authority
WESTERN RANGE OP W4031 311559Z MAY 11.
NAVAREA
NAVAREA XII
issued by
WESTERN RANGE OP
sea
North Pacific Ocean
position
16.785, -125.296
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 1350Z TO 1525Z DAILY
   09 THRU 13 JUN IN AREAS BOUND BY:
    A. 34-30N 120-38W, 34-32N 120-47W,
       34-46N 120-42W, 34-44N 120-33W.
    B. 34-05N 121-00W, 34-23N 120-54W,
       34-18N 120-37W, 34-01N 120-43W.
    C. 13-52N 126-39W, 19-23N 125-30W,
       19-07N 124-04W, 13-36N 125-16W.
2. CANCEL THIS MSG 131625Z JUN.

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

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

99
00
05
10
11

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 00:06Z; 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.