Hazardous operations 040915Z to 041230Z apr, alternate 0915Z to 1215Z daily 05 thru 08 apr in areas bound…
North Pacific Ocean · HYDROPAC 1230/18
What this record establishes
Archived notice · 2018-03-30 17:12Z
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) · RTS SAFETY KWAJALEIN MH 282201Z MAR 18.. Issued 2018-03-30 08:16Z. 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
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 5 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2018-04-04 09:15Z | 2018-04-04 12:30Z | — | 3 h 15 |
| 2018-04-05 09:15Z | 2018-04-05 12:15Z | — | 3 h |
| 2018-04-06 09:15Z | 2018-04-06 12:15Z | — | 3 h |
| 2018-04-07 09:15Z | 2018-04-07 12:15Z | — | 3 h |
| 2018-04-08 09:15Z | 2018-04-08 12:15Z | — | 3 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2018-03-30 08:16Z
- status
- Archived notice
- self-cancels
- 2018-04-08 13:15Z
- authority
- RTS SAFETY KWAJALEIN MH 282201Z MAR 18.
- issued by
- RTS SAFETY KWAJALEIN MH
- sea
- North Pacific Ocean
- position
- 10.637, 167.781
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTH PACIFIC.
DNC 12.
1. HAZARDOUS OPERATIONS 040915Z TO 041230Z APR,
ALTERNATE 0915Z TO 1215Z DAILY 05 THRU 08 APR
IN AREAS BOUND BY:
A. 09-26N 167-28E, 09-27N 167-28E,
09-27N 167-29E, 09-25N 167-28E,
09-24N 167-28E, 09-24N 167-27E.
B. 10-26N 167-21E, 11-04N 167-35E,
11-13N 167-49E, 11-07N 168-08E,
10-50N 168-12E, 10-12N 167-59E,
10-04N 167-44E, 10-09N 167-27E.
2. CANCEL THIS MSG 081315Z APR 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
123 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 130800Z to 131330Z jun, alternate 0800Z to 1330Z daily 14 jun thru 03 jul in areas…2025-06-03
- Hazardous operations 010700Z to 011411Z nov, alternate 020700Z to 021411Z nov in areas bound by a. 09-53.00N…2023-10-27
- Hazardous operations 060700Z to 061411Z sep, alternate 070700Z to 071411Z sep in areas bound by: a.…2023-09-01
- Hazardous operations 222200Z to 230400Z mar, alternate 2200Z to 0400Z daily 23 thru 28 mar in areas bound…2023-03-21
- Hazardous operations 070700Z to 071411Z sep, alternate 080700Z to 081411Z sep in area bound by 10-11.00N…2022-09-01
- Hazardous operations 160700Z to 161409Z aug, alternate 170700Z to 171409Z aug in area bound by 10-13.00N…2022-08-11
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 05:05Z; 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.