Surveys

Survey operations in progress until 30 mar by M/V ocean link along trackling joining 43-14.09N 007-46.66E,…

Ligurian Sea · HYDROLANT 585/23

What this record establishes

Archived notice · 2023-03-31 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 22/23 171205Z MAR 23.. Issued 2023-03-17 14:33Z. 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 the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.

Current notices and reporting history in the Ligurian Sea →

issued: 2023-03-17 14:33Z
status: Archived notice
self-cancels: 2023-03-31 00:01Z
authority: NAVAREA III 22/23 171205Z MAR 23.
NAVAREA: NAVAREA III · named as the source of this relay
sea: Ligurian Sea
position: 43.492, 9.058
vessel: M/V OCEAN LINK · 4 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN MEDITERRANEAN SEA.
TYRRHENIAN SEA.
LIGURIAN SEA.
ITALY.
DNC 08.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 30 MAR
   BY M/V OCEAN LINK ALONG TRACKLING JOINING
   43-14.09N 007-46.66E, 43-23.29N 008-06.76E,
   43-52.07N 008-36.51E, 43-56.24N 008-44.59E,
   44-10.35N 008-55.51E, 44-17.16N 008-58.84E,
   44-20.83N 008-58.44E, 44-23.06N 008-59.06E,
   44-23.51N 008-59.01E, 44-23.17N 008-59.14E,
   44-22.05N 008-59.15E, 44-20.56N 008-58.91E,
   44-15.02N 009-01.11E, 44-12.32N 009-02.15E,
   44-10.08N 009-01.87E, 44-08.06N 009-02.30E,
   44-06.93N 009-03.61E, 43-45.05N 009-11.87E,
   43-24.98N 009-30.98E, 43-17.60N 009-34.58E,
   42-44.03N 009-48.91E, 42-10.89N 009-51.50E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 310001Z MAR 23.

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.
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.
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.

All warning terms →

Collected reports in this area · survey operations

189 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

55 survey operations listed in force · see all

Record snapshot 2026-10-01 08:18Z; 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.