Surveys

Underwater operations by four vessels off Turkey in the eastern Mediterranean from 1 to 25 October, with a wide berth requested.

Mediterranean Sea - Eastern Basin · HYDROLANT 1943/26

What this record establishes

Cancelled notice · 2026-09-30 15:00Z

This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.

Source and dates: NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-09-30 14:42Z. First collected 2026-09-30 16:02Z; last seen in collection 2026-09-30 21:32Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered: Mediterranean Sea - Eastern Basin. 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 Mediterranean Sea - Eastern Basin →

issued: 2026-09-30 14:42Z
status: Cancelled notice
self-cancels: 2026-10-26 00:01Z
sea: Mediterranean Sea - Eastern Basin
position: 35.733, 33.088
source: NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-09-30 16:02Z

Original warning text

EASTERN MEDITERRANEAN SEA.
TURKEY.
1. UNDERWATER OPERATIONS 01 THRU 25 OCT
   BY M/V ORUC REIS, M/V DENAR ECHO, M/V KIRICI
   AND M/V DENAR PATHFINDER IN AREA BOUND BY
   35-47.12N 033-00.26E, 36-01.65N 032-45.72E,
   36-00.97N 032-48.22E, 36-04.41N 032-52.90E,
   36-05.97N 032-57.70E, 35-48.34N 033-04.13E,
   35-49.44N 033-07.64E, 35-29.77N 033-20.96E,
   35-20.39N 033-30.58E, 35-27.98N 033-17.81E,
   35-19.87N 033-23.33E, 35-45.04N 032-53.67E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 260001Z OCT 26.

Reading this warning

Underwater operations: Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
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.
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

175 within 180 nm since 2001 · 1 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 2026-09-30 21:46Z; 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.