Cable ops

Seismic survey 090001Z jan to 282359Z feb by M/V hugin explorer and M/V ocean europe in area bound by…

Gulf of Guinea · HYDROLANT 47/17

What this record establishes

Archived notice · 2017-03-01 00:59Z

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 10/17 051619Z JAN 17.. Issued 2017-01-05 16:27Z. 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 →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2017-01-09 00:01Z	2017-02-28 23:59Z	—	1223 h 58

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued: 2017-01-05 16:27Z
status: Archived notice
self-cancels: 2017-03-01 00:59Z
authority: NAVAREA II 10/17 051619Z JAN 17.
NAVAREA: NAVAREA II · named as the source of this relay
sea: Gulf of Guinea
position: 3.033, 6.711
vessels: M/V HUGIN EXPLORER · 20 messages M/V OCEAN EUROPE · 179 messages
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

GULF OF GUINEA.
NIGERIA.
DNC 01.
1. SEISMIC SURVEY 090001Z JAN TO 282359Z FEB
   BY M/V HUGIN EXPLORER AND M/V OCEAN EUROPE
   IN AREA BOUND BY
   03-01.03N 006-35.78E, 03-08.65N 006-43.78E,
   03-03.70N 006-49.35E, 02-55.07N 006-41.97E.
   FIVE MILE BERTH REQUESTED.
2. CANCEL THIS MSG 010059Z MAR 17.

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.
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.
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

55 within 180 nm since 1999 · 0 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

Newly discovered dangersWrecks · 79 nm
Dangerous wreck in 04-18.50N 007-02.20EWrecks · 79 nm
Aids to navigationNav aids · 86.4 nm

Worldwide in the collected sources

24 cable & pipeline work listed in force · see all

Record snapshot 2026-10-02 02:15Z; 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.