Hazardous operations
North Pacific Ocean · HYDROPAC 3550/15
What this record establishes
Archived notice · 2015-11-01 09:40Z
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) · USAKA KWAJALEIN OP 362-1 PHONCOM 282229Z OCT 15.. Issued 2015-10-28 23:45Z. 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
- North Pacific Ocean. 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 North Pacific Ocean →
Activity windows · 5 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2015-11-01 00:30Z | 2015-11-01 07:05Z | — | 6 h 35 |
| 2015-11-02 00:30Z | 2015-11-02 07:05Z | — | 6 h 35 |
| 2015-11-03 00:30Z | 2015-11-03 07:05Z | — | 6 h 35 |
| 2015-11-04 00:30Z | 2015-11-04 07:05Z | — | 6 h 35 |
| 2015-11-05 00:30Z | 2015-11-05 07:05Z | — | 6 h 35 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2015-10-28 23:45Z
- status
- Archived notice
- self-cancels
- 2015-11-05 08:05Z
- authority
- USAKA KWAJALEIN OP 362-1 PHONCOM 282229Z OCT 15.
- issued by
- RTS SAFETY KWAJALEIN MH
- sea
- North Pacific Ocean
- position
- 16.435, 169.482
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTH PACIFIC.
MARSHALL ISLANDS.
HAZARDOUS OPERATIONS.
DNC 12, DNC 13.
1. HAZARDOUS OPERATIONS 010030Z TO 010705Z NOV,
ALTERNATE 0030Z TO 0705Z DAILY 02 THRU 05 NOV
IN AREAS BOUND BY:
A. 18-56.4N 164-39.6E, 20-33.0N 165-06.0E,
20-44.4N 166-31.2E, 20-36.0N 167-51.6E,
20-15.0N 169-19.8E, 17-57.0N 170-57.0E,
17-09.0N 169-26.4E, 15-25.8N 171-01.2E,
14-08.4N 171-39.0E, 14-01.8N 168-30.0E,
15-27.0N 167-18.0E, 17-20.4N 165-49.8E.
B. 13-36.6N 172-39.0E, 11-00.6N 171-51.6E,
10-45.6N 174-03.6E, 12-30.6N 175-01.8E.
C. 14-30.0N 174-34.2E, 12-54.6N 177-47.4E,
12-12.0N 176-49.2E, 14-17.4N 174-14.4E.
2. CANCEL HYDROPAC 3540/15.
3. CANCEL THIS MSG 050805Z NOV 15.
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.
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- 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
26 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.
- Hazardous operations 030900Z to 031718Z oct, alternate 040900Z to 171718Z oct in areas bound by: a.…2023-09-29
- Hazardous operations 030900Z to 031718Z oct, alternate 0900Z to 1718Z daily 04 thru 17 oct in areas bound…2023-09-28
- Hazardous operations2015-10-28
- Hazardous operations2015-10-27
- Hazardous operations2015-10-22
- Hazardous operations2015-10-03
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
28 military exercises listed in force · see all
Record snapshot 2026-10-02 03:52Z; 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.