Gunnery exercises 0400Z to 0800Z daily 24 thru 28 sep in area bound by 37-35N 124-41E, 37-35N 124-44E,…
Yellow Sea · HYDROPAC 2691/12
What this record establishes
Archived notice · 2012-09-28 09:00Z
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 636/12 211404Z SEP 12 - NAVAREA VIII 453/12 211005Z SEP 12.. Issued 2012-09-21 14:41Z. 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
Activity windows · 5 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2012-09-24 04:00Z | 2012-09-24 08:00Z | — | 4 h |
| 2012-09-25 04:00Z | 2012-09-25 08:00Z | — | 4 h |
| 2012-09-26 04:00Z | 2012-09-26 08:00Z | — | 4 h |
| 2012-09-27 04:00Z | 2012-09-27 08:00Z | — | 4 h |
| 2012-09-28 04:00Z | 2012-09-28 08:00Z | — | 4 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2012-09-21 14:41Z
- status
- Archived notice
- self-cancels
- 2012-09-28 09:00Z
- authority
- NAVAREA XI 636/12 211404Z SEP 12 - NAVAREA VIII 453/12 211005Z SEP 12.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Yellow Sea
- position
- 37.492, 124.723
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
YELLOW SEA. GUNNERY. 1. GUNNERY EXERCISES 0400Z TO 0800Z DAILY 24 THRU 28 SEP IN AREA BOUND BY 37-35N 124-41E, 37-35N 124-44E, 37-30N 124-44E, 37-30N 124-46E, 37-25N 124-46E, 37-25N 124-42E. 2. CANCEL HYDROPAC 2642/12(61,63,71). 3. CANCEL THIS MSG 280900Z SEP 12.
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.
Collected reports in this area · military exercises
1356 within 180 nm since 2000 · 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 0400Z to 0900Z daily 26 and 27 apr, 0600Z to 1200Z daily 28 and 29 apr, 300400Z to 300800Z…2021-04-24
- Gunnery exercises 2300Z to 0900Z daily 25 thru 27 apr in area bound by 37-44-55N 124-05-10E, 37-44-55N…2021-04-21
- Gunnery exercises 190800Z to 191300Z apr and 0400Z to 0900Z daily 20, 22, 23, 24 apr and 250600Z to 251200Z…2021-04-16
- Gunnery exercises 142300Z to 151100Z apr in area bound by 37-44-55N 124-05-10E, 37-44-55N 124-36-40E,…2021-04-09
- Gunnery exercises 0400Z to 0900Z daily 12, 13, 16 and 17 apr and 180800Z to 181300Z apr in area bound by…2021-04-09
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
31 military exercises listed in force · see all
Record snapshot 2026-09-30 04:19Z; 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.