Surveys

Survey operations in progress until 29 apr by M/V tcg cubuklu in area bound by 41-29.55N 030-19.39E,…

Black Sea · HYDROLANT 1007/21

What this record establishes

Archived notice · 2021-04-30 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 374/21 131203Z APR 21.. Issued 2021-04-13 14:30Z. 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: Black 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 Black Sea →

issued: 2021-04-13 14:30Z
status: Archived notice
authority: NAVAREA III 374/21 131203Z APR 21.
NAVAREA: NAVAREA III · named as the source of this relay
sea: Black Sea
position: 41.733, 30.643
vessel: M/V TCG CUBUKLU · 8 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

BLACK SEA.
TURKEY.
DNC 10.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 29 APR
   BY M/V TCG CUBUKLU IN AREA BOUND BY
   41-29.55N 030-19.39E, 41-29.60N 031-21.17E,
   41-55.63N 031-21.78E, 41-55.52N 029-43.60E,
   41-41.42N 029-43.73E, 41-40.72N 030-18.45E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 30 APR 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

218 within 180 nm since 1999 · 14 in the last 12 months · 6 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

Drilling operations by fatih platform (imo 9503770Surveys · 32.1 nm
Pipeline operations 05 jun thru 07 oct by M/V oruc reis, M/V mukavemet, M/V zaganos pasa, M/V denar…Cable ops · 48.8 nm
Pipeline operations in progress until 07 oct 26 by M/V mukavemet, M/V oruc rei̇s, M/V dina polaris, M/V…Cable ops · 52.9 nm
Drilling operations by yavuz rig (imo 9503768, mmsi 271046765) supported by osman bey, aybuke, florya,…Surveys · 70.7 nm
1- drilling operations by yildirim rig (imo 9705469, mmsi 271053959), supported by ertugrul bey, aybuke,…Surveys · 73.7 nm
Drilling operations by the kanuni platform (imo 9541203Surveys · 75.2 nm
1- drilling operations by abdulhamid han rig (imo 9705093Surveys · 91.3 nm

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-02 19:13Z; 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.