Surveys

Survey operations in progress until 30 jul by M/V dong fang kan tan NO1, M/V dong fang kan tan NO2, M/V dong…

Gulf of Guinea · HYDROLANT 121/19

What this record establishes

Archived notice · 2019-05-16 15:51Z

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 9/19 141646Z JAN 19.. Issued 2019-01-14 17:02Z. 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
2019-01-14 17:02Z
status
Archived notice
authority
NAVAREA II 9/19 141646Z JAN 19.
NAVAREA
NAVAREA II · named as the source of this relay
sea
Gulf of Guinea
position
5.650, 4.973
vessels
M/V DONG FANG KAN TAN NO1M/V DONG FANG KAN TAN NO2M/V DONG FANG KAN TAN NO3M/V FOS ORIONM/V FOS VIRGO
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. SURVEY OPERATIONS IN PROGRESS UNTIL 30 JUL
   BY M/V DONG FANG KAN TAN NO1,
   M/V DONG FANG KAN TAN NO2,
   M/V DONG FANG KAN TAN NO3, M/V FOS VIRGO AND
   M/V FOS ORION IN AREA BOUND BY
   05-55N 004-56E, 05-27N 005-14E,
   05-23N 005-00E, 05-52N 004-43E.
   TWO MILE BERTH REQUESTED.
2. CANCEL THIS MSG 31 JUL 19.

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.
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

18 within 180 nm since 2002 · 0 in the last 12 months · 0 listed in force now

02
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

56 survey operations listed in force · see all

Record snapshot 2026-10-01 23:08Z; 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.