Hazardous operations 2200Z to 0530Z daily 31 aug thru 08 sep in areas bound by: a. 52-14.00N 167-01.00W,…
North Pacific Ocean · NAVAREA XII 589/23
What this record establishes
Archived notice · 2023-08-31 23:08Z
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 0/23 290014Z AUG 23.. Issued 2023-08-29 00:25Z. 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
- The ocean cleanup system operations in progress by M/V maersk trader and M/V maersk tender towing 800 meter…cancelled by this notice
- Cancel NAVAREA XII 589/23 and this msg, refer to NAVAREA XII 594/23later cancellation notice
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 9 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2023-08-31 22:00Z | 2023-09-01 05:30Z | — | 7 h 30 |
| 2023-09-01 22:00Z | 2023-09-02 05:30Z | — | 7 h 30 |
| 2023-09-02 22:00Z | 2023-09-03 05:30Z | — | 7 h 30 |
| 2023-09-03 22:00Z | 2023-09-04 05:30Z | — | 7 h 30 |
| 2023-09-04 22:00Z | 2023-09-05 05:30Z | — | 7 h 30 |
| 2023-09-05 22:00Z | 2023-09-06 05:30Z | — | 7 h 30 |
| 2023-09-06 22:00Z | 2023-09-07 05:30Z | — | 7 h 30 |
| 2023-09-07 22:00Z | 2023-09-08 05:30Z | — | 7 h 30 |
| … 1 more | |||
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2023-08-29 00:25Z
- status
- Archived notice
- self-cancels
- 2023-09-09 06:30Z
- authority
- RTS SAFETY KWAJALEIN MH 0/23 290014Z AUG 23.
- NAVAREA
- NAVAREA XII
- issued by
- RTS SAFETY KWAJALEIN MH
- sea
- North Pacific Ocean
- position
- 51.145, -169.707
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH PACIFIC.
NORTH PACIFIC.
ALASKA.
1. HAZARDOUS OPERATIONS 2200Z TO 0530Z DAILY
31 AUG THRU 08 SEP IN AREAS BOUND BY:
A. 52-14.00N 167-01.00W, 52-22.00N 167-10.00W,
51-32.00N 171-19.00W, 50-53.00N 172-26.00W,
50-13.00N 173-18.00W, 49-38.00N 172-42.00W,
49-55.00N 171-30.00W, 50-21.00N 169-50.00W.
B. 53-54.00N 157-54.00W, 53-44.00N 159-17.00W,
53-25.00N 159-10.00W, 53-35.00N 157-48.00W.
2. CANCEL NAVAREA XII 538/23.
3. CANCEL THIS MSG 090630Z SEP 23.
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.
- 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.
- NAVAREA
- One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
- 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.
Collected reports in this area · military exercises
10 within 180 nm since 2008 · 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 2200Z to 0530Z daily 02 thru 10 sep in areas bound by: a. 52-14.00N 167-01.00W,…2023-08-31
- Hazardous operations 2200Z to 0530Z daily 31 aug thru 08 sep in areas bound by: a. 49-38.00N 172-42.00W,…2023-08-27
- Hazardous operations 2200Z to 0530Z daily 27 thru 30 aug in areas bound by: a. 49-38.00N 172-42.00W,…2023-08-22
- Hazardous operations 302200Z to 310330Z aug, alternate 2200Z to 0330Z daily 31 aug thru 04 sep in area bound…2022-08-30
- Hazardous operations 292200Z to 300330Z aug, alternate 2200Z to 0330Z daily 30 aug thru 02 sep in area bound…2022-08-24
- Gunnery and pyrotechnic operations 242000Z to 250400Z aug in area within 500 yards of 52-54N 172-07W2018-08-24
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 00:54Z; 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.