Hazardous operations: a. 070631Z to 071428Z nov, alternate 080631Z to 081428Z nov in area bound by 15-10N…
North Pacific Ocean · HYDROPAC 3964/18
What this record establishes
Archived notice · 2018-11-07 07:52Z
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) · WESTERN RANGE 191912Z OCT 18.. Issued 2018-11-02 09:06Z. 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
- Cancel HYDROPAC 3964/18 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 4 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2018-11-07 06:31Z | 2018-11-07 14:01Z | — | 7 h 30 |
| 2018-11-07 06:31Z | 2018-11-07 14:28Z | — | 7 h 57 |
| 2018-11-08 06:31Z | 2018-11-08 14:01Z | — | 7 h 30 |
| 2018-11-08 06:31Z | 2018-11-08 14:28Z | — | 7 h 57 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2018-11-02 09:06Z
- status
- Archived notice
- self-cancels
- 2018-11-08 15:28Z
- authority
- WESTERN RANGE 191912Z OCT 18.
- issued by
- WESTERN RANGE
- sea
- North Pacific Ocean
- position
- 14.967, 177.659
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTH PACIFIC.
DNC 12, DNC 13.
1. HAZARDOUS OPERATIONS:
A. 070631Z TO 071428Z NOV, ALTERNATE
080631Z TO 081428Z NOV IN AREA BOUND BY
15-10N 175-51E, 16-25N 178-42E,
14-46N 179-28E, 13-31N 176-38E.
B. 070631Z TO 071401Z NOV, ALTERNATE
080631Z TO 081401Z NOV IN AREA BOUND BY
12-59N 171-04E, 13-48N 172-14E,
13-11N 173-47E, 11-38N 174-07E,
10-44N 172-56E, 11-29N 171-34E.
3. CANCEL THIS MSG 081528Z NOV 18.
Reading this warning
- 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.
- 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
27 within 180 nm since 2004 · 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 310631Z to 311431Z jul, alternate 0631Z to 1431Z daily 01 and 02 aug in area bound by…2018-07-26
- Hazardous operations 140751Z to 141630Z may, alternate 150751Z to 151630Z may in areas bound by: a. 15-26N…2018-05-09
- Hazardous operations 070645Z to 071508Z feb, alternate 0645Z to 1508Z daily 08 and 09 feb in area bound by…2018-02-02
- Hazardous operations 0631Z to 1429Z daily 02 thru 04 aug in area bound by 14-09N 175-16E, 15-07N 174-47E,…2017-07-28
- Hazardous operations 0631Z to 1429Z daily 26 apr thru 01 may in area bound by 15-16N 174-41E, 16-33N…2017-04-21
- Hazardous operations 0631Z to 1333Z daily 26 apr thru 01 may in areas bound by: a. 34-18N 124-51W, 34-39N…2017-04-21
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
10 military exercises listed in force · see all
Record snapshot 2026-10-03 06:32Z; 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.