Cable ops

Seismic survey 01 thru 09 jul by M/V barbaros hayreddin pasa, M/V bravo supporter and M/V kofso in area…

Sea of Marmara · HYDROLANT 1642/16

What this record establishes

Archived notice · 2016-07-10 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) · TURKEY 40/16 300459Z JUN 16.. Issued 2016-06-30 08:16Z. 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 Marmara. 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 Sea of Marmara →

issued: 2016-06-30 08:16Z
status: Archived notice
authority: TURKEY 40/16 300459Z JUN 16.
issued by: TURKEY
sea: Sea of Marmara
position: 40.805, 27.499
vessels: M/V BARBAROS HAYREDDIN PASA · 56 messages M/V BRAVO SUPPORTER · 43 messages M/V KOFSO · 13 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SEA OF MARMARA.
TURKEY.
DNC 10.
1. SEISMIC SURVEY 01 THRU 09 JUL BY
   M/V BARBAROS HAYREDDIN PASA,
   M/V BRAVO SUPPORTER AND M/V KOFSO
   IN AREA BOUND BY
   40-54.12N 027-58.85E, 40-59.55N 027-45.62E,
   40-56.82N 027-31.03E, 40-50.97N 027-29.05E,
   40-38.20N 027-14.73E, 40-45.65N 027-32.73E,
   40-53.35N 027-35.78E, 40-55.95N 027-46.58E,
   40-52.30N 027-52.45E.
   THREE MILE BERTH REQUESTED.
2. CANCEL THIS MSG 10 JUL 16.

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.
Seismic survey: A survey that maps the rock beneath the seabed with sound pulses from air guns, recorded on streamers kilometres long.
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 · cable & pipeline work

97 within 180 nm since 1999 · 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

25 cable & pipeline work listed in force · see all

Record snapshot 2026-09-29 14:44Z; source collection times vary.

Cable ops

Cable laying, pipeline and seismic operations. All current cable & pipeline work →

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.