Hazardous operations 190700Z to 191427Z apr, alternate 200700Z to 201427Z apr in areas bound by: a.…
North Pacific Ocean · HYDROPAC 1233/23
What this record establishes
Archived notice · 2023-04-20 15:27Z
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 101342Z APR 23.. Issued 2023-04-14 05:43Z. 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 1233/23 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 2 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2023-04-19 07:00Z | 2023-04-19 14:27Z | — | 7 h 27 |
| 2023-04-20 07:00Z | 2023-04-20 14:27Z | — | 7 h 27 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2023-04-14 05:43Z
- status
- Archived notice
- self-cancels
- 2023-04-20 15:27Z
- authority
- RTS SAFETY KWAJALEIN MH 0/23 101342Z APR 23.
- issued by
- RTS SAFETY KWAJALEIN MH
- sea
- North Pacific Ocean
- position
- 12.283, 171.445
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTH PACIFIC.
MARSHALL ISLANDS.
DNC 12.
1. HAZARDOUS OPERATIONS 190700Z TO 191427Z APR,
ALTERNATE 200700Z TO 201427Z APR
IN AREAS BOUND BY:
A. 09-15.00N 169-03.00E, 09-59.00N 168-38.00E,
09-41.00N 167-51.00E, 09-23.00N 167-33.00E,
09-08.00N 167-06.00E, 08-45.00N 167-20.00E,
08-49.00N 167-35.00E, 09-05.00N 167-59.00E,
08-50.00N 168-08.00E, 08-50.00N 168-19.00E.
B. 14-28.00N 172-10.00E, 13-44.00N 170-37.00E,
12-02.00N 170-29.00E, 11-08.00N 171-53.00E,
11-54.00N 173-27.00E, 13-31.00N 173-33.00E.
2. CANCEL THIS MSG 201527Z APR 23.
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
60 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 0613Z to 1431Z daily 06 and 07 sep in area bound by 13-36.00N 174-20.00E, 13-16.00N…2023-09-01
- Hazardous operations 0631Z to 1431Z daily 06 and 07 sep in area bound by 13-17.00N 173-49.00E, 13-36.00N…2023-09-01
- Hazardous operations 0631Z to 1431Z daily 04 and 08 aug in areas bound by: a. 15-06.00N 177-34.00E,…2022-07-30
- Hazardous operations: a. 0631Z to 1431Z daily 04 thru 08 aug in area bound by 15-24.00N 177-15.00E,…2022-07-30
- Hazardous operations 190830Z to 191430Z oct, alternate 0830Z to 1430Z daily 20 thru 29 oct in area bound by…2021-10-15
- Hazardous operations 210830Z to 211430Z jun, alternate 0830Z to 1430Z daily 22 thru 30 jun in area bound by…2021-06-22
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 05:10Z; 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.