Hazardous operations are scheduled near Guam from 24 to 25 September within a defined ocean area, cancelled after 25 September.
North Pacific Ocean · HYDROPAC 2720/26
What this record establishes
Cancelled notice · 2026-09-23 14:45Z
This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.
- Source and dates
- NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-09-16 09:05Z. First collected 2026-09-23 15:02Z; last seen in collection 2026-09-24 13:02Z. 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.
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2026-09-24 20:00Z | 2026-09-25 10:00Z | — | 14 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2026-09-16 09:05Z
- status
- Cancelled notice
- self-cancels
- 2026-09-25 11:00Z
- sea
- North Pacific Ocean
- position
- 11.702, 143.988
- source
- NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-09-23 15:02Z
Original warning text
NORTH PACIFIC. GUAM. 1. HAZARDOUS OPERATIONS 242000Z TO 251000Z SEP IN AREA BOUND BY 12-40.00N 144-45.00E, 11-00.00N 144-45.00E, 11-00.00N 143-00.00E, 11-45.00N 143-00.00E, 12-40.00N 144-16.15E. 2. CANCEL THIS MSG 251100Z SEP 26.
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.
- 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
957 within 180 nm since 2002 · 53 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 0100Z to 1300Z daily 28 thru 30 sep and 01 oct in areas within three miles of: a.…2026-09-23
- Hazardous operations 2200Z to 1000Z daily 28 thru 30 sep in area bound by 12-40.00N 144-45.00E, 11-00.00N…2026-09-23
- Hazardous operations 2200Z to 0700Z daily 28 and 29 sep in 13-29.05N 144-40.05E2026-09-16
- Hazardous operations 210300Z to 210500Z and 250100Z to 250300Z sep in area bound by 13-24.75N 144-38.30E,…2026-09-16
- Hazardous operations 0100Z to 1300Z daily 22 thru 24 sep in areas within three miles of: a. 13-27.00N…2026-09-16
- Hazardous operations 162300Z to 170200Z sep in 13-29.05N 144-40.05E2026-09-15
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
Worldwide in the collected sources
17 military exercises listed in force · see all
Record snapshot 2026-09-24 13:03Z; 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.