Surveys

Survey operations in progress until 21 jun by M/V DENAR-2 in area bound by 42-52.90N 031-05.87E, 42-49.11N…

Black Sea · HYDROLANT 1172/21

What this record establishes

Archived notice · 2021-06-22 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 432/21 281443Z APR 21.. Issued 2021-04-28 15:22Z. 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: 2021-04-28 15:22Z
status: Archived notice
authority: NAVAREA III 432/21 281443Z APR 21.
NAVAREA: NAVAREA III · named as the source of this relay
sea: Black Sea
position: 42.368, 31.556
vessel: M/V DENAR-2 · 3 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 21 JUN
   BY M/V DENAR-2 IN AREA BOUND BY
   42-52.90N 031-05.87E, 42-49.11N 031-06.69E,
   42-48.42N 031-13.77E, 41-52.15N 031-51.41E,
   41-49.18N 031-44.00E, 41-33.95N 032-01.44E,
   41-37.40N 032-08.80E, 41-55.74N 032-00.44E,
   41-53.43N 031-54.62E, 42-48.83N 031-17.38E,
   42-51.07N 031-22.85E, 42-51.15N 031-22.86E,
   42-58.02N 031-33.86E, 43-04.28N 031-44.11E,
   43-08.87N 031-38.25E, 43-02.81N 031-27.95E,
   42-59.99N 031-31.48E, 42-54.15N 031-22.09E,
   42-54.83N 031-21.93E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 22 JUN 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

228 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

Pipeline operations 05 jun thru 07 oct by M/V oruc reis, M/V mukavemet, M/V zaganos pasa, M/V denar…Cable ops · 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 · 10.9 nm
Drilling operations by the kanuni platform (imo 9541203Surveys · 31.4 nm
1- drilling operations by yildirim rig (imo 9705469, mmsi 271053959), supported by ertugrul bey, aybuke,…Surveys · 32.3 nm
Drilling operations by yavuz rig (imo 9503768, mmsi 271046765) supported by osman bey, aybuke, florya,…Surveys · 33 nm
1- drilling operations by abdulhamid han rig (imo 9705093Surveys · 41.9 nm
Drilling operations by fatih platform (imo 9503770Surveys · 61.4 nm
Underwater operations 05 jan 25 thru 31 dec 26 in area bound by 44-04.40N 030-34.13E, 44-02.40N 030-30.50E,…Surveys · 102.4 nm
1- neptun alpha production platform has been established at the central coordinate point: 44-02.85N 030-35.25EStructures · 109.4 nm

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-03 02:41Z; 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.