Surveys

Survey operations in progress until 30 aug by M/V durable along trackline joining 41-22.68N 006-04.83E,…

Mediterranean Sea - Western Basin · HYDROLANT 871/24

What this record establishes

Archived notice · 2024-08-31 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 41/24 231123Z APR 24.. Issued 2024-04-24 11:55Z. 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: Mediterranean Sea - Western Basin. 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 Mediterranean Sea - Western Basin →

issued: 2024-04-24 11:55Z
status: Archived notice
self-cancels: 2024-08-31 00:01Z
authority: NAVAREA III 41/24 231123Z APR 24.
NAVAREA: NAVAREA III · named as the source of this relay
sea: Mediterranean Sea - Western Basin
position: 39.556, 6.978
vessel: M/V DURABLE · 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.
SARDINIA.
DNC 08.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 30 AUG BY
   M/V DURABLE ALONG TRACKLINE JOINING
   41-22.68N 006-04.83E, 40-48.32N 006-18.98E,
   40-35.13N 006-27.95E, 40-15.33N 006-35.79E,
   39-54.92N 006-43.00E, 38-47.17N 007-08.41E,
   38-38.06N 007-18.84E, 38-29.31N 007-34.62E,
   38-21.26N 007-51.48E, 38-09.15N 008-13.33E,
   38-07.79N 008-15.79E, 38-06.70N 008-17.48E.
2. CANCEL THIS MSG 310001Z AUG 24.

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.
Track line joining: Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
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.
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

118 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

Cable operations by MV maasvliet (IMO-9996915) days 281200 UTC sep 26 until further notice in the segments:…Cable ops · 108.8 nm

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-01 14:49Z; 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.