Surveys

Oceanographic operations 26 mar thru 01 apr by M/V le suroit along trackline between 00-00N 010-00W and…

South Atlantic Ocean · HYDROLANT 653/12

What this record establishes

Archived notice · 2012-04-02 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 96/12 240053Z MAR 12 - NAVAREA VI 41/12 240200Z MAR 12.. Issued 2012-03-24 04:58Z. 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 the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the South Atlantic Ocean →

issued
2012-03-24 04:58Z
status
Archived notice
authority
NAVAREA II 96/12 240053Z MAR 12 - NAVAREA VI 41/12 240200Z MAR 12.
NAVAREA
NAVAREA II · named as the source of this relay
sea
South Atlantic Ocean
position
0.000, -8.500
vessel
M/V LE SUROIT · 66 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN ATLANTIC.
GULF OF GUINEA.
1. OCEANOGRAPHIC OPERATIONS 26 MAR THRU 01 APR
   BY M/V LE SUROIT ALONG TRACKLINE BETWEEN
   00-00N 010-00W AND 00-00N 007-00W.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 626/12(24).
3. CANCEL THIS MSG 02 APR.

Reading this warning

Track line joining
Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
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 · survey operations

5 within 180 nm since 2011 · 0 in the last 12 months · 0 listed in force now

11
15
20
22

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 2026-10-03 00:04Z; 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.