Surveys

Hydrographic survey in progress until 19 jan by M/V tcg mesaha 2 in area bound by 41-00.4N 028-59.1E,…

Sea of Marmara · HYDROLANT 43/07

What this record establishes

Archived notice · 2007-01-20 00:00Z

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 8/07 080813Z JAN 07.. Issued 2007-01-08 09:50Z. 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.

Related notices and cancellation links

Current notices and reporting history in the Sea of Marmara →

issued
2007-01-08 09:50Z
status
Archived notice
authority
NAVAREA III 8/07 080813Z JAN 07.
NAVAREA
NAVAREA III · named as the source of this relay
sea
Sea of Marmara
position
41.060, 29.040
vessel
M/V TCG MESAHA 2
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HYDROGRAPHIC SURVEY IN PROGRESS UNTIL 19 JAN
   BY M/V TCG MESAHA 2 IN AREA BOUND BY
   41-00.4N 028-59.1E, 40-57.2N 028-59.0E,
   40-57.2N 029-02.1E, 40-58.1N 029-01.9E,
   41-11.1N 029-06.5E, 41-11.1N 029-04.6E.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 43/06 DTG 080433Z JAN, MSG PROMULGATED IN ERROR.
3. CANCEL THIS MSG 20 JAN.

Reading this warning

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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
HYDROLANT
The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
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.
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

149 within 180 nm since 1999 · 9 in the last 12 months · 5 listed in force now

99
00
05
10
15
20
25
26

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

J
F
M
A
M
J
J
A
S
O
N
D

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

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-03 03:15Z; 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.