Cable ops

Seismic survey by M/V hawk explorer towing 12000 meter long cables: a. 02 mar along trackline joining…

South Atlantic Ocean · HYDROLANT 546/13

What this record establishes

Archived notice · 2013-03-08 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 V S 251/13 020109Z MAR 13.. Issued 2013-03-02 01:42Z. 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 -32.508, -48.974. 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
2013-03-02 01:42Z
status
Archived notice
authority
NAVAREA V S 251/13 020109Z MAR 13.
NAVAREA
NAVAREA V · named as the source of this relay
issued by
NAVAREA V S
sea
South Atlantic Ocean
position
-32.508, -48.974
vessel
M/V HAWK EXPLORER · 214 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

BRAZIL-SOUTH COAST.
1. SEISMIC SURVEY BY M/V HAWK EXPLORER TOWING
   12000 METER LONG CABLES:
   A. 02 MAR ALONG TRACKLINE JOINING
      32-32.52S 048-27.58W, 31-30.59S 049-52.39W,
      33-29.00S 047-52.40W, 31-51.37S 050-03.28W.
   B. 03 AND 04 MAR ALONG TRACKLINE BETWEEN
      33-29.00S 047-52.40W AND 31-51.37S 050-03.28W.
   C. 05 THRU 07 MAR VICINITY 31-51.37S 050-03.28W.
   SIX MILE BERTH REQUESTED.
2. CANCEL THIS MSG 08 MAR 13.

Reading this warning

Seismic survey
A survey that maps the rock beneath the seabed with sound pulses from air guns, recorded on streamers kilometres long.
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.
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.
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

63 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
05
10
15
17

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

23 cable & pipeline work listed in force · see all

Record snapshot 2026-09-25 01:53Z; 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.