Exercises

Hazardous operations are scheduled near Guam in the North Pacific on 29 to 30 September and 30 September to 1 October within a defined ocean area.

North Pacific Ocean · HYDROPAC 2778/26

What this record establishes

Listed in force

The latest collected record lists this warning as active. This is the status of the notice, not a live observation of conditions at the location.

Source and dates
NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-09-25 07:56Z. First collected 2026-09-25 18:02Z; last seen in collection 2026-09-25 21:32Z. 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 · 2 in this warning

opens (UTC)closes (UTC)locallength
2026-09-29 23:00Z2026-09-30 09:00Z—10 h
2026-09-30 23:00Z2026-10-01 07:00Z—8 h

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued
2026-09-25 07:56Z
status
Listed in force
self-cancels
2026-10-01 08:00Z
sea
North Pacific Ocean
position
11.702, 143.988
nearest port
Saipan · 235 nm
source
NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-09-25 18:02Z

Original warning text

NORTH PACIFIC.
GUAM.
1. HAZARDOUS OPERATIONS 292300Z TO 300900Z SEP
   AND 302300Z SEP TO 010700Z OCT
   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 HYDROPAC 2774/26.
3. CANCEL THIS MSG 010800Z OCT 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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
HYDROPAC
The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
CANCEL THIS MSG
The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Conditions at the position · now

loading…

MET Norway · NOAA WaveWatch III · HYCOM · GEBCO 2020 · model data at the centroid, not an observation

Collected reports in this area · military exercises

960 within 180 nm since 2002 · 56 in the last 12 months · 3 listed in force now

02
05
10
15
20
25
26

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.

Month of issue in the collected archive

J
F
M
A
M
J
J
A
S
O
N
D

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

30 military exercises listed in force · see all

Record snapshot 2026-09-25 21:45Z; 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.