Surveys

Underwater operations 07 thru 31 oct by M/V yokosuka towing submersible in area bound by 07-50S 106-50E,…

Indian Ocean · HYDROPAC 1823/02

What this record establishes

Archived notice · 2002-11-01 00:00Z

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) · NAVAREA XI 647/02 020802Z OCT 02. Issued 2002-10-02 16:05Z. 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 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 Indian Ocean →

issued: 2002-10-02 16:05Z
status: Archived notice
authority: NAVAREA XI 647/02 020802Z OCT 02
NAVAREA: NAVAREA XI · named as the source of this relay
sea: Indian Ocean
position: -7.795, 105.620
vessel: M/V YOKOSUKA · 99 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. UNDERWATER OPERATIONS 07 THRU 31 OCT BY M/V YOKOSUKA
   TOWING SUBMERSIBLE IN AREA BOUND BY
   07-50S 106-50E, 09-00S 106-50E, 08-20S 105-30E,
   07-25S 104-10E, 06-40S 104-30E.
2. CANCEL THIS MSG 01 NOV.

Reading this warning

Underwater operations: Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
Tow / towing: A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
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.

All warning terms →

Collected reports in this area · survey operations

2 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.

Survey operations in progress until 31 aug by mv/ elsa regent towing five mile long cable in area bound by…2018-07-17

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

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-03 02:41Z; 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.