Exercises

Hazardous operations in progress until 221400Z mar and 232100Z to 251100Z mar in areas: a. between 37-25N…

Japan Sea · HYDROPAC 479/05

What this record establishes

Archived notice · 2005-03-23 10:43Z

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) · COMSEVENTHFLT 200320Z MAR 05.. Issued 2005-03-22 12:29Z. 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
Japan 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.

Related notices and cancellation links

Current notices and reporting history in the Japan Sea →

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2005-03-23 21:00Z2005-03-25 11:00Z—38 h

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

issued
2005-03-22 12:29Z
status
Archived notice
self-cancels
2005-03-25 12:00Z
authority
COMSEVENTHFLT 200320Z MAR 05.
issued by
COMSEVENTHFLT
sea
Japan Sea
position
36.622, 131.333
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HAZARDOUS OPERATIONS IN PROGRESS UNTIL 221400Z MAR
   AND 232100Z TO 251100Z MAR IN AREAS:
   A. BETWEEN 37-25N 37-20N AND 130-13E 130-19E.
   B. BOUND BY 36-39N 131-16E, 36-39N 131-22E,
      36-34N 131-22E.
   C. BETWEEN 37-58N 37-48N AND 130-55E 131-10E.
2. CANCEL THIS MSG 251200Z 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.
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

328 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 2026-10-04 02:01Z; 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.