Exercises

Gunnery exercises 2300Z to 1000Z commencing daily 18 and 22 thru 25 mar in area bound by 43-47-07N…

Sea of Okhotsk · HYDROPAC 533/10

What this record establishes

Archived notice · 2010-03-26 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) · NAVAREA XI 165/10 170815Z MAR 10.. Issued 2010-03-18 11:11Z. 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
Sea of Okhotsk. 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 Sea of Okhotsk →

issued
2010-03-18 11:11Z
status
Archived notice
self-cancels
2010-03-26 11:00Z
authority
NAVAREA XI 165/10 170815Z MAR 10.
NAVAREA
NAVAREA XI · named as the source of this relay
sea
Sea of Okhotsk
position
43.799, 145.631
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

NORTH PACIFIC.
JAPAN.
HOKKAIDO.
GUNNERY.
1. GUNNERY EXERCISES 2300Z TO 1000Z COMMENCING
   DAILY 18 AND 22 THRU 25 MAR
   IN AREA BOUND BY
   43-47-07N 145-33-45E, 43-48-45N 145-33-59E,
   43-48-45N 145-41-54E, 43-47-07N 145-41-54E.
2. CANCEL HYDROPAC 527/10.
3. CANCEL THIS MSG 261100Z MAR.

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

33 within 180 nm since 2010 · 2 in the last 12 months · 0 listed in force now

10
15
20
25
26

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

Worldwide in the collected sources

9 military exercises listed in force · see all

Record snapshot 2026-10-03 21:13Z; 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.