Surveys

Survey operations in progress until 25 nov by M/V artic in area bound by 43-11.30N 009-34.20E, 43-13.19N…

Ligurian Sea · HYDROLANT 2764/21

What this record establishes

Archived notice · 2021-11-26 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) · NAVAREA III 815/21 091204Z NOV 21.. Issued 2021-11-09 13:05Z. 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: Ligurian Sea. 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 Ligurian Sea →

issued: 2021-11-09 13:05Z
status: Archived notice
authority: NAVAREA III 815/21 091204Z NOV 21.
NAVAREA: NAVAREA III · named as the source of this relay
sea: Ligurian Sea
position: 43.447, 9.163
vessel: M/V ARTIC · 2 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

TYRRHENIAN SEA.
LIGURIAN SEA.
CORSICA.
DNC 08.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 25 NOV
   BY M/V ARTIC IN AREA BOUND BY
   43-11.30N 009-34.20E, 43-13.19N 009-33.52E,
   43-18.25N 009-31.14E, 43-19.36N 009-29.91E,
   43-21.39N 009-28.90E, 43-23.09N 009-28.87E,
   43-26.84N 009-26.00E, 43-28.08N 009-23.70E,
   43-28.42N 009-22.14E, 43-28.61N 009-08.82E,
   43-28.86N 009-06.86E, 43-29.74N 009-04.95E,
   43-34.79N 008-59.53E, 43-38.37N 008-52.68E,
   43-39.19N 008-42.80E, 43-38.49N 008-37.11E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 26 NOV 21.

Reading this warning

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.
Survey operations: A research or survey vessel is mapping the seabed or water column, often while towing equipment.
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

193 within 180 nm since 1998 · 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

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 2026-10-02 15:44Z; 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.