Ordnance

Underwater ordnance detonations 300001Z sep to 020001Z oct in areas bound by: a. 25-00N 154-20W, 25-00N…

North Pacific Ocean · NAVAREA XII 336/99

What this record establishes

Archived notice · 1999-10-02 01:01Z

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) · COMNAVSURFPAC 281725Z SEP 99. Issued 1999-09-29 17:36Z. 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.

Current notices and reporting history in the North Pacific Ocean →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
1999-09-30 00:01Z	1999-10-02 00:01Z	—	48 h

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

issued: 1999-09-29 17:36Z
status: Archived notice
self-cancels: 1999-10-02 01:01Z
authority: COMNAVSURFPAC 281725Z SEP 99
NAVAREA: NAVAREA XII
issued by: COMNAVSURFPAC
sea: North Pacific Ocean
position: 26.433, -150.676
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. UNDERWATER ORDNANCE DETONATIONS 300001Z SEP TO 020001Z OCT
   IN AREAS BOUND BY:
   A. 25-00N 154-20W, 25-00N 154-12W, 28-56N 150-18W, 29-15N 149-58W,
      33-26N 145-17W, 34-10N 146-20W, 25-40N 155-15W.
   B. 24-25N 153-41W, 28-27N 149-42W, 28-46N 149-22W, 32-55N 144-42W,
      32-05N 143-40W, 23-36N 152-40W.
2. CANCEL THIS MSG 020101Z OCT.

Reading this warning

Unexploded ordnance: Bombs, shells, mines or torpedoes found on the seabed or washed up, and the operations to remove or destroy them.
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 · ordnance operations

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

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

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

0 ordnance operations listed in force · see all

Record snapshot 2026-09-24 17:19Z; source collection times vary.

Ordnance

Ordnance disposal, underwater detonations and unexploded ordnance. All current ordnance operations →

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.