Exercises

Hazardous operations 1730Z to 2330Z daily 05 and 06 sep 52-31.3N 159-29.2E, 52-39.0N 159-29.2E, 52-39.0N…

North Pacific Ocean · HYDROPAC 1423/01

What this record establishes

Archived notice · 2001-09-07 00:30Z

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) · PETRO 102/01 POR EGC #57409 300917Z AUG 01; PETRO 104/01 POR EGC #57535 300920Z AUG 01. Issued 2001-08-30 13:45Z. 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 parsed report position is 52.389, 159.910. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the North Pacific Ocean →

issued
2001-08-30 13:45Z
status
Archived notice
self-cancels
2001-09-07 00:30Z
authority
PETRO 102/01 POR EGC #57409 300917Z AUG 01; PETRO 104/01 POR EGC #57535 300920Z AUG 01
issued by
PETRO
sea
North Pacific Ocean
position
52.389, 159.910
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HAZARDOUS OPERATIONS 1730Z TO 2330Z DAILY 05 AND 06 SEP
   52-31.3N 159-29.2E, 52-39.0N 159-29.2E, 52-39.0N 159-42.0E,
   52-07.5N 160-32.5E, 52-00.0N 160-20.0E.
2. CANCEL HYDROPAC 1300/01.
3. CANCEL THIS MSG 070030Z 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.
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.

All warning terms →

Collected reports in this area · military exercises

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

99
00
05
10
15
20
22

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

17 military exercises listed in force · see all

Record snapshot 2026-09-25 14:24Z; 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.