Hazardous operations
Eastern China Sea · HYDROPAC 2001/13
What this record establishes
Archived notice · 2013-07-10 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 498/13 090857Z JUL 13.. Issued 2013-07-09 09:28Z. 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
- Eastern China 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.
Current notices and reporting history in the Eastern China Sea →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2013-07-09 16:00Z | 2013-07-10 10:00Z | — | 18 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2013-07-09 09:28Z
- status
- Archived notice
- self-cancels
- 2013-07-10 11:00Z
- authority
- NAVAREA XI 498/13 090857Z JUL 13.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Eastern China Sea
- position
- 28.186, 122.415
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EAST CHINA SEA. HAZARDOUS OPERATIONS. 1. HAZARDOUS OPERATIONS 091600Z TO 101000Z JUL IN AREA BOUND BY 29-10N 122-03E, 29-10N 123-15E, 27-25N 123-15E, 27-25N 121-10E, 27-51N 121-10E, 28-09N 121-40E, 28-24N 121-55E. 2. CANCEL THIS MSG 101100Z JUL 13.
Reading this warning
- Hazardous operations
- NGA's heading for activities that make an area dangerous — most often rocket launches, space debris and weapons firings, and some open-ended danger areas.
- 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.
- 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
7 within 180 nm since 2011 · 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.
- Hazardous operations 160100Z to 160700Z apr in area bound by 26-56.40N 122-22.08E, 26-32.94N 121-57.06E,…2023-04-14
- Gunnery exercises in progress until 070400Z aug in area bound by 25-03.00N 122-11.00E, 25-34.00N 122-11.00E,…2022-08-05
- Hazardous operations2014-07-28
- Hazardous operations2013-07-10
- Hazardous operations 1600Z to 1000Z commencing daily 09 thru 14 jul, alternate 1600Z to 1000Z commencing…2012-07-06
- Gunnery exercises 1600Z to 1000Z commencing daily 13 thru 17 jul in area bound by 30-03N 122-24E, 30-03N…2011-07-13
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 2026-10-02 20:50Z; 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.