Exercises

Hazardous operations

North Pacific Ocean · HYDROPAC 3811/14

What this record establishes

Archived notice · 2014-12-22 09:00Z

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) · COMCOGARD SECTOR GUAM 760/14 210243Z DEC 14 - NAVAREA XI 967/14 201205Z DEC 14.. Issued 2014-12-21 06:40Z. 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 parsed report position is 16.018, 146.060 with a 12.0 nm radius. It is a position in the source message, not a live location. 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 · 1 in this warning

opens (UTC)closes (UTC)locallength
2014-12-21 21:00Z2014-12-22 08:00Z—11 h

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

issued
2014-12-21 06:40Z
status
Archived notice
self-cancels
2014-12-22 09:00Z
authority
COMCOGARD SECTOR GUAM 760/14 210243Z DEC 14 - NAVAREA XI 967/14 201205Z DEC 14.
NAVAREA
NAVAREA XI · named as the source of this relay
issued by
COMCOGARD SECTOR GUAM
sea
North Pacific Ocean
position
16.018, 146.060 · r 12.0 nm
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN NORTH PACIFIC.
MARIANA ISLANDS.
HAZARDOUS OPERATIONS.
DNC 12.
1. HAZARDOUS OPERATIONS 212100Z TO 220800Z DEC
   WITHIN 12 MILES OF 16-01-06N 146-03-35E.
2. CANCEL HYDROPAC 1949/14, 3216/14(94).
3. CANCEL THIS MSG 220900Z DEC 14.

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.
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.
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.
Within a radius of
A circular area — every position within a stated distance of a point.
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 →

Collected reports in this area · military exercises

1505 within 180 nm since 2002 · 47 in the last 12 months · 0 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

9 military exercises listed in force · see all

Record snapshot 2026-10-02 15:02Z; 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.