Ordnance

Underwater ordnance detonations 212200Z to 221000Z and 222200Z to 231000Z mar within 0.5 miles of 36-01.4N…

Japan Sea · HYDROPAC 474/03

What this record establishes

Archived notice · 2003-03-23 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) · EODMU FIVE DET FIVE ONE 060010Z MAR 03. Issued 2003-03-17 14:47Z. 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 parsed report position is 36.023, 129.463 with a 0.5 nm radius. 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 Japan Sea →

Activity windows · 2 in this warning

opens (UTC)closes (UTC)locallength
2003-03-21 22:00Z2003-03-22 10:00Z—12 h
2003-03-22 22:00Z2003-03-23 10:00Z—12 h

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

issued
2003-03-17 14:47Z
status
Archived notice
self-cancels
2003-03-23 11:00Z
authority
EODMU FIVE DET FIVE ONE 060010Z MAR 03
issued by
EODMU FIVE DET FIVE ONE
sea
Japan Sea
position
36.023, 129.463 · r 0.5 nm
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. UNDERWATER ORDNANCE DETONATIONS 212200Z TO 221000Z
   AND 222200Z TO 231000Z MAR WITHIN 0.5 MILES OF
   36-01.4N 129-27.8E.
2. CANCEL HYDROPAC 468/03, MSG NOT PROMULGATED.
3. CANCEL THIS MSG 231100Z MAR.

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.
Within a radius of
A circular area — every position within a stated distance of a point.
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.

All warning terms →

Collected reports in this area · ordnance operations

21 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

0 ordnance operations listed in force · see all

Record snapshot 2026-10-03 12:17Z; 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.