Surveys

Survey operations in progress until 160001Z oct by M/V ramform titan towing 12 five mile long cables, in…

Gulf of Guinea · HYDROLANT 2670/18

What this record establishes

Archived notice · 2018-10-16 01:01Z

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 334/18 210911Z AUG 18.. Issued 2018-08-21 10:08Z. 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
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.

Current notices and reporting history in the Gulf of Guinea →

issued
2018-08-21 10:08Z
status
Archived notice
self-cancels
2018-10-16 01:01Z
authority
NAVAREA II 334/18 210911Z AUG 18.
NAVAREA
NAVAREA II · named as the source of this relay
sea
Gulf of Guinea
position
3.501, 8.024
vessel
M/V RAMFORM TITAN · 89 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

GULF OF GUINEA.
EQUATORIAL GUINEA.
DNC 01.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 160001Z OCT
   BY M/V RAMFORM TITAN TOWING 12 FIVE MILE LONG CABLES,
   IN AREA BOUND BY
   04-00.0N 008-22.0E, 03-49.0N 008-30.0E
   03-36.0N 008-24.5E, 03-25.5N 008-11.0E
   03-18.0N 008-11.0E, 03-00.0N 007-43.0E
   03-20.0N 007-34.0E, 03-36.0N 007-47.0E.
   SEVEN MILE BERTH REQUESTED.
2. CANCEL THIS MSG 160101Z OCT 18.

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.
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.
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.
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

34 within 180 nm since 2003 · 1 in the last 12 months · 0 listed in force now

03
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

55 survey operations listed in force · see all

Record snapshot 2026-09-26 20:40Z; 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.