Surveys

Underwater operations in progress until further notice by M/V coral sea in 28-27.5S 015-52.5E

South Atlantic Ocean · HYDROLANT 2759/13

What this record establishes

Archived notice · 2013-11-18 10:40Z

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 367/13 040926Z NOV 13 - WZ 1223/13 041040Z NOV 13 - WZ 1224/13 041100Z NOV 13.. Issued 2013-11-04 12:06Z. 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 parsed report position is -28.458, 15.875. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the South Atlantic Ocean →

issued
2013-11-04 12:06Z
status
Archived notice
authority
NAVAREA VII 367/13 040926Z NOV 13 - WZ 1223/13 041040Z NOV 13 - WZ 1224/13 041100Z NOV 13.
NAVAREA
NAVAREA VII · named as the source of this relay
sea
South Atlantic Ocean
position
-28.458, 15.875
vessel
M/V CORAL SEA · 154 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN SOUTH ATLANTIC.
NAMIBIA.
1. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER
   NOTICE BY M/V CORAL SEA IN 28-27.5S 015-52.5E.
   TWO MILE BERTH REQUESTED.
2. CANCEL HYDROLANT 2749/13(36), AID RESTORED.
3. CANCEL HYDROLANT 2755/13(35), AID RESTORED.
4. CANCEL HYDROLANT 2667/13.

Reading this warning

Underwater operations
Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
Until further notice
The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
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 · survey operations

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

03
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

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-02 23:46Z; 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.