Exercises

Gunnery exercises 0001Z to 1300Z daily 01, 02, 04, 06 thru 09, 11 thru 16, 18 thru 23 and 25 thru 30 apr in…

Yellow Sea · HYDROPAC 506/05

What this record establishes

Archived notice · 2005-04-30 14:00Z

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) · NAVAREA XI 139/05 280505Z MAR 2005; NAVAREA XI 140/05 280805Z MAR 05.. Issued 2005-03-28 09:16Z. 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
Yellow 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 Yellow Sea →

issued
2005-03-28 09:16Z
status
Archived notice
self-cancels
2005-04-30 14:00Z
authority
NAVAREA XI 139/05 280505Z MAR 2005; NAVAREA XI 140/05 280805Z MAR 05.
NAVAREA
NAVAREA XI · named as the source of this relay
sea
Yellow Sea
position
37.561, 125.149
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. GUNNERY EXERCISES 0001Z TO 1300Z DAILY 01, 02, 04,
   06 THRU 09, 11 THRU 16, 18 THRU 23 AND 25 THRU 30 APR
   IN AREA BOUND BY 37-41-00N 125-39-30E,
   37-37-20N 125-39-00E, 37-30-45N 125-24-00E,
   37-26-00N 125-24-00E, 37-26-00N 125-04-00E,
   37-32-15N 124-48-00E, 37-38-40N 124-45-00E,
   37-42-00N 124-45-00E, 37-42-00N 124-56-00E,
   37-37-30N 125-01-30E, 37-34-00N 125-14-45E,
   37-40-00N 125-32-00E.
2. CANCEL HYDROPAC 1295/04(71), AID RESTORED.
3. CANCEL THIS MSG 301400Z APR.

Reading this warning

Gunnery and live firing
Naval or coastal guns firing into a sea area for practice, at stated times.
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.
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

1358 within 180 nm since 2000 · 0 in the last 12 months · 0 listed in force now

00
05
10
15
20
21

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

10 military exercises listed in force · see all

Record snapshot 2026-10-03 08:52Z; 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.