Gunnery exercises 172300Z to 181400Z jun in area bound by 38-26-31N 128-28-22E, 38-25-30N 128-55-11E,…
Japan Sea · HYDROPAC 1240/10
What this record establishes
Archived notice · 2010-06-18 15:00Z
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 437/10 140740Z JUN 10.. Issued 2010-06-14 07:58Z. 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
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2010-06-17 23:00Z | 2010-06-18 14:00Z | — | 15 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2010-06-14 07:58Z
- status
- Archived notice
- self-cancels
- 2010-06-18 15:00Z
- authority
- NAVAREA XI 437/10 140740Z JUN 10.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Japan Sea
- position
- 38.361, 128.721
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SEA OF JAPAN. GUNNERY. 1. GUNNERY EXERCISES 172300Z TO 181400Z JUN IN AREA BOUND BY 38-26-31N 128-28-22E, 38-25-30N 128-55-11E, 38-15-46N 128-55-11E, 38-18-25N 128-32-32E. 2. CANCEL HYDROPAC 1226/10. 3. CANCEL THIS MSG 181500Z JUN.
Reading this warning
- Gunnery and live firing
- Naval or coastal guns firing into a sea area for practice, at stated times.
- 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.
- 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.
Collected reports in this area · military exercises
441 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now
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.
- Gunnery exercises 290300Z to 290700Z apr in area bound by 37-41-00N 125-39-30E, 37-41-00N 125-41-40E,…2021-04-27
- Gunnery exercises 110400Z to 111200Z mar in area bound by 37-41-00N 125-39-30E, 37-41-00N 125-41-40E,…2021-03-05
- Gunnery exercises 190500Z to 190700Z feb in area bound by 37-41-00N 125-39-30E, 37-41-00N 125-41-40E,…2021-02-14
- Gunnery exercises 0001Z to 0900Z daily 28 feb and 03 mar in area bound by 37-41-00N 125-39-30E, 37-41-00N…2017-02-27
- Gunnery exercises 0001Z to 0900Z daily 29 and 30 nov in area bound by 37-41-00N 125-39-30E, 37-41-00N…2016-11-28
- Gunnery exercises 0001Z to 0900Z daily 28 and 29 jul in area bound by 37-41-00N 125-39-30E, 37-37-20N…2016-07-27
Month of issue in the collected archive
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 2026-10-03 14:29Z; 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.