Exercises

Hazardous operations 270100Z to 271000Z mar in areas bound by: a. 25-26.0N 131-42.0E, 25-13.0N 132-31.0E,…

Philippine Sea · HYDROPAC 539/08

What this record establishes

Archived notice · 2008-03-27 11:00Z

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) · E-MAIL QM1 GRIMES 24 MAR 08.. Issued 2008-03-24 23:19Z. 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
Philippine Sea. 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 Philippine Sea →

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2008-03-27 01:00Z2008-03-27 10:00Z—9 h

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

issued
2008-03-24 23:19Z
status
Archived notice
self-cancels
2008-03-27 11:00Z
authority
E-MAIL QM1 GRIMES 24 MAR 08.
issued by
E-MAIL
sea
Philippine Sea
position
24.908, 131.206
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HAZARDOUS OPERATIONS 270100Z TO 271000Z MAR
   IN AREAS BOUND BY:
   A. 25-26.0N 131-42.0E, 25-13.0N 132-31.0E,
      24-00.0N 133-00.0E, 24-00.0N 131-23.0E,
      24-07.0N 131-11.0E, 24-23.0N 130-48.0E.
   B. 25-26.0N 131-42.0E, 24-23.0N 130-48.0E,
      24-53.0N 130-04.0E, 25-41.0N 130-45.0E.
   C. 25-48.0N 129-02.4E, 25-44.0N 129-26.0E,
      25-44.0N 130-11.0E, 25-43.0N 130-36.0E,
      25-41.0N 130-45.0E, 24-53.0N 130-04.0E,
      25-41.0N 128-52.0E.
2. CANCEL THIS MSG 271100Z MAR.

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

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

99
00
05
09

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 04:34Z; 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.