Surveys

Underwater operations in progress until further notice: a. in area between 31-55S 32-13S and 115-20E 115-33E

Indian Ocean · HYDROPAC 2825/12

What this record establishes

Archived notice · 2012-11-24 10:58Z

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) · AUSCOAST 264/12 090552Z OCT 12.. Issued 2012-10-09 09:02Z. 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: Indian Ocean. The parsed report position is -28.717, 113.783 with a 3.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the Indian Ocean →

issued: 2012-10-09 09:02Z
status: Archived notice
authority: AUSCOAST 264/12 090552Z OCT 12.
issued by: AUSCOAST
sea: Indian Ocean
position: -28.717, 113.783 · r 3.0 nm
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

AUSTRALIA-WEST COAST.
UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE:
A. IN AREA BETWEEN 31-55S 32-13S AND 115-20E 115-33E.
B. IN AREA BETWEEN 30-54S 31-05S AND 114-54E 115-08E.
C. IN AREA BETWEEN 29-09S 29-48S AND 114-21E 114-43E.
D. WITHIN THREE MILES OF 28-43S 113-47E.
ONE MILE BERTH REQUESTED.

Reading this warning

Underwater operations: Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
Until further notice: The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
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.
Within a radius of: A circular area — every position within a stated distance of a point.
Wide berth requested: Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.

All warning terms →

Collected reports in this area · survey operations

9 within 180 nm since 2012 · 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

4 X yellow surface buoys, fl y 5 sec, established within 0.3NM of 29-27.00S 114-52.18ENav aids · 72 nm

Worldwide in the collected sources

55 survey operations listed in force · see all

Record snapshot 2026-10-02 01:57Z; 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.