Cable ops

Seismic survey in progress until further notice by M/V geo coral towing 12 8100 meter long cables in area…

South Atlantic Ocean · HYDROLANT 2549/13

What this record establishes

Archived notice · 2013-10-17 10:31Z

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 VII 335/13 150700Z OCT 13.. Issued 2013-10-15 09:08Z. 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
South Atlantic Ocean. 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 South Atlantic Ocean →

issued
2013-10-15 09:08Z
status
Archived notice
authority
NAVAREA VII 335/13 150700Z OCT 13.
NAVAREA
NAVAREA VII · named as the source of this relay
sea
South Atlantic Ocean
position
-7.144, 11.058
vessel
M/V GEO CORAL · 58 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN SOUTH ATLANTIC.
ANGOLA.
1. SEISMIC SURVEY IN PROGRESS UNTIL FURTHER NOTICE BY
   M/V GEO CORAL TOWING 12 8100 METER LONG CABLES
   IN AREA BOUND BY
   07-01.73S 010-41.65E, 06-52.57S 010-45.26E,
   06-46.29S 010-53.37E, 06-47.88S 011-01.78E,
   06-52.13S 011-10.95E, 07-04.57S 011-18.80E,
   07-12.19S 011-39.50E, 07-21.82S 011-17.04E,
   07-29.46S 011-04.84E, 07-26.89S 010-54.57E,
   07-21.81S 010-45.62E.
   FIVE MILE BERTH REQUESTED.
2. CANCEL HYDROLANT 2533/13.

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.
Until further notice
The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
Towed array / streamer
Equipment towed a long way behind a vessel — sonar, a hydrophone cable, a sampling sled — invisible at the surface.
Tow / towing
A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
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.

All warning terms →

Collected reports in this area · cable & pipeline work

91 within 180 nm since 1999 · 4 in the last 12 months · 2 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

24 cable & pipeline work listed in force · see all

Record snapshot 2026-10-02 04:05Z; 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.