Surveys

Survey operations in progress until 30 nov by M/V eko and M/V anna 1 towing 300 meter long cable along…

Sea of Azov · HYDROLANT 2394/15

What this record establishes

Archived notice · 2015-12-01 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 539/15 242305Z SEP 15.. Issued 2015-09-25 00:24Z. 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: Sea of Azov. 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 Sea of Azov →

issued: 2015-09-25 00:24Z
status: Archived notice
authority: NAVAREA III 539/15 242305Z SEP 15.
NAVAREA: NAVAREA III · named as the source of this relay
sea: Sea of Azov
position: 45.197, 36.504
vessels: M/V ANNA 1 M/V EKO · 6 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

KERCH STRAIT.
DNC 10.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 30 NOV
   BY M/V EKO AND M/V ANNA 1 TOWING 300 METER
   LONG CABLE ALONG TRACKLINE JOINING
   45-12.33N 036-36.18E, 45-11.99N 036-35.27E,
   45-11.79N 036-33.74E, 45-11.91N 036-32.25E,
   45-12.06N 036-29.96E, 45-11.99N 036-28.44E,
   45-11.42N 036-26.29E, 45-11.04N 036-24.28E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 01 DEC 15.

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.
Towed array / streamer: Equipment towed a long way behind a vessel — sonar, a hydrophone cable, a sampling sled — invisible at the surface.
Tow / towing: A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
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.
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

61 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.

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 20:17Z; 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.