Exercises

Hazardous operations 061730Z to 062130Z sep, alternate 1730Z to 2130Z daily 07 and 08 sep in area bound by…

North Pacific Ocean · HYDROPAC 871/99

What this record establishes

Archived notice · 1999-09-07 09:10Z

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) · CDRUSAKA KWAJALEIN OP #K6491 302215Z AUG 99; 010057Z SEP 99. Issued 1999-09-01 07:50Z. 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 · 1 in this warning

opens (UTC)closes (UTC)locallength
1999-09-06 17:30Z1999-09-06 21:30Z—4 h

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

issued
1999-09-01 07:50Z
status
Archived notice
self-cancels
1999-09-08 22:30Z
authority
CDRUSAKA KWAJALEIN OP #K6491 302215Z AUG 99; 010057Z SEP 99
issued by
CDRUSAKA KWAJALEIN OP
sea
North Pacific Ocean
position
13.968, 167.381
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HAZARDOUS OPERATIONS 061730Z TO 062130Z SEP, ALTERNATE
   1730Z TO 2130Z DAILY 07 AND 08 SEP IN AREA BOUND BY
   19-21N 166-55E, 16-36N 168-18E, 12-00N 169-54E,
   10-15N 168-51E, 08-49N 168-12E, 08-49N 167-47E,
   08-55N 167-47E, 08-55N 167-42E, 09-25N 167-30E,
   09-25N 167-11E, 10-30N 166-46E, 11-00N 166-46E,
   11-00N 167-11E, 11-45N 167-11E, 11-45N 165-54E,
   13-12N 165-24E, 16-42N 165-24E, 19-15N 166-28E.
2. CANCEL THIS MSG 082230Z SEP.

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.
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.
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.

All warning terms →

Collected reports in this area · military exercises

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

99
00
05
10
15
19

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

28 military exercises listed in force · see all

Record snapshot 2026-10-02 04:03Z; 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.