Cable ops

Seismic survey in progress until 08 sep by M/V bos arctic in area bound by 03-54.3N 007-27.9W, 04-17.3N…

Gulf of Guinea · HYDROLANT 1615/10

What this record establishes

Archived notice · 2010-09-09 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 II 325/10 271042Z AUG 10 - NAVAREA III 275/10 271001Z AUG 10.. Issued 2010-08-27 11:46Z. 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
Gulf of Guinea. 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 Gulf of Guinea →

issued
2010-08-27 11:46Z
status
Archived notice
authority
NAVAREA II 325/10 271042Z AUG 10 - NAVAREA III 275/10 271001Z AUG 10.
NAVAREA
NAVAREA II · named as the source of this relay
sea
Gulf of Guinea
position
4.606, -6.106
vessel
M/V BOS ARCTIC · 7 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

GULF OF GUINEA.
1. SEISMIC SURVEY IN PROGRESS UNTIL 08 SEP
   BY M/V BOS ARCTIC IN AREA BOUND BY
   03-54.3N 007-27.9W, 04-17.3N 006-25.4W
   04-35.0N 005-32.4W, 04-35.0N 004-53.0W
   04-35.0N 004-45.0W, 05-09.4N 004-45.0W
   05-08.7N 004-53.0W, 05-07.5N 005-10.8W
   05-05.1N 005-32.5W, 04-53.9N 006-00.0W
   04-48.9N 006-25.0W, 04-40.7N 006-50.0W
   04-20.8N 007-31.7W.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 1557/10(55).
3. CANCEL THIS MSG 09 SEP.

Reading this warning

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.
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.
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

47 within 180 nm since 2004 · 0 in the last 12 months · 0 listed in force now

04
05
10
15
20
24

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

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

22 cable & pipeline work listed in force · see all

Record snapshot 2026-09-25 21:54Z; 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.