Surveys

Underwater operations in progress until 01 oct in area bound by 13-10N 144-43E, 13-10N 144-30E, 12-45N…

North Pacific Ocean · HYDROPAC 1899/11

What this record establishes

Archived notice · 2011-10-02 00:01Z

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 363/11 301843Z JUN 11.. Issued 2011-07-01 00:21Z. 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.

Current notices and reporting history in the North Pacific Ocean →

issued: 2011-07-01 00:21Z
status: Archived notice
authority: COMCOGARD SECTOR GUAM 363/11 301843Z JUN 11.
issued by: COMCOGARD SECTOR GUAM
sea: North Pacific Ocean
position: 11.743, 144.013
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

PHILIPPINE SEA.
MARIANA ISLANDS.
1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 01 OCT
   IN AREA BOUND BY
   13-10N 144-43E, 13-10N 144-30E, 12-45N 144-30E,
   11-45N 143-00E, 11-00N 143-00E, 11-00N 144-45E.
   TEN MILE BERTH REQUESTED.
2. CANCEL THIS MSG 02 OCT.

Reading this warning

Underwater operations: Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
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.
Wide berth requested: Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
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 · survey operations

13 within 180 nm since 2002 · 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.

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

Hazardous operations 2200Z to 1000Z daily 28 thru 30 sep in area bound by 12-40.00N 144-45.00E, 11-00.00N…Exercises · 2.9 nm
Hazardous operations 292300Z to 300900Z sep and 302300Z sep to 010700Z oct in area bound by 12-40.00N…Exercises · 2.9 nm
Hazardous operations 252000Z to 261000Z sep in area bound by 13-32.00N 144-04.00E, 13-32.00N 144-27.00E,…Exercises · 95.1 nm
Uscg remote communication facility guam 13-29.00N 144-50.00E broadcast and communication services unreliableNav aids · 115 nm
Guam hf NAVTEX station, V, 13-29.0N 144-50.0E, off airNav aids · 115 nm

Worldwide in the collected sources

55 survey operations listed in force · see all

Record snapshot 2026-10-02 08:53Z; source collection times vary.

Surveys

Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →

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.