Hazardous operations
Philippine Sea · HYDROPAC 1445/11
What this record establishes
Archived notice · 2011-05-18 08:01Z
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) · CTF 74 110949Z MAY 11.. Issued 2011-05-13 12:10Z. 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
- Philippine 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
- Hazardous operationscancelled by this notice
- Hazardous operationslater cancellation notice
Current notices and reporting history in the Philippine Sea →
Activity windows · 5 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2011-05-13 19:00Z | 2011-05-14 19:00Z | — | 24 h |
| 2011-05-19 19:00Z | 2011-05-21 19:00Z | — | 48 h |
| 2011-05-26 20:00Z | 2011-05-27 19:00Z | — | 23 h |
| 2011-05-28 21:00Z | 2011-05-29 18:00Z | — | 21 h |
| 2011-05-29 22:00Z | 2011-05-30 17:00Z | — | 19 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2011-05-13 12:10Z
- status
- Archived notice
- self-cancels
- 2011-05-30 18:00Z
- authority
- CTF 74 110949Z MAY 11.
- issued by
- CTF
- sea
- Philippine Sea
- position
- 21.250, 124.625
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SOUTH CHINA SEA.
WESTERN NORTH PACIFIC.
HAZARDOUS OPERATIONS.
1. HAZARDOUS OPERATIONS:
A. IN PROGRESS UNTIL 132359Z MAY
IN AREA BOUND BY
14-00N 113-40E, 14-00N 116-00E,
12-00N 115-00E, 11-00N 113-40E.
B. 131900Z TO 141900Z MAY
IN AREA BOUND BY
14-00N 115-00E, 15-00N 118-00E,
13-30N 119-30E, 12-25N 115-00E.
C. 191900Z TO 211900Z MAY
IN AREA BOUND BY
20-00N 115-00E, 20-00N 118-00E,
19-00N 119-00E, 15-30N 119-00E,
15-30N 117-00E.
D. 262000Z TO 271900Z MAY
IN AREA BOUND BY
22-30N 122-00E, 22-30N 127-00E,
19-00N 127-00E, 20-00N 122-30E.
E. 282100Z TO 291800Z MAY
IN AREA BETWEEN
20-00N 16-00N AND 139-00E 145-00E.
F. 292200Z TO 301700Z MAY
IN AREA BETWEEN
20-00N 16-00N AND 146-00E 151-00E.
2. CANCEL HYDROPAC 1373/11.
3. CANCEL THIS MSG 301800Z MAY.
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.
- 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
191 within 180 nm since 2003 · 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 0100Z to 0230Z daily 12 and 13 jan in area bound by 24-24.00N 122-20.00E, 24-24.00N…2023-01-07
- Hazardous operations 0330Z to 1000Z daily 09 thru 15 dec in areas bound by: a. 23-38.00N 123-22.00E,…2022-12-06
- Hazardous operations in progress until 080200Z aug in area bound by 23-13.00N 122-30.00E, 23-40.00N…2022-08-04
- Gunnery exercise 040400Z to 070400Z aug in area bound by 23-38.00N 123-23.00E, 23-38.00N 122-51.00E,…2022-08-02
- Hazardous operations: a. 092006Z to 092038Z dec in area bound by 23-54-32N 122-54-26E, 23-24-43N 124-26-27E,…2020-12-08
- Gunnery exercises 1130Z to 1220Z daily 01, 08, 15, 22 and 29 may in area bound by 23-15-00N 121-37-00E,…2019-04-26
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 01:54Z; 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.