Cable ops

Seismic survey 01 apr thru 20 jul by M/V duke towing 8000 meter long cable in area bound by 21-05.2N…

South China Sea · HYDROPAC 869/14

What this record establishes

Archived notice · 2014-05-01 02:36Z

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 XI 237/14 271134Z MAR 14.. Issued 2014-03-27 17:12Z. 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 China Sea. 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 South China Sea →

issued
2014-03-27 17:12Z
status
Archived notice
authority
NAVAREA XI 237/14 271134Z MAR 14.
NAVAREA
NAVAREA XI · named as the source of this relay
sea
South China Sea
position
21.873, 120.099
vessel
M/V DUKE · 15 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

NORTHERN SOUTH CHINA SEA.
TAIWAN-SOUTHWEST COAST.
1. SEISMIC SURVEY 01 APR THRU 20 JUL BY
   M/V DUKE TOWING 8000 METER LONG CABLE
   IN AREA BOUND BY
   21-05.2N 119-54.4E, 21-08.4N 119-46.4E,
   21-13.7N 119-39.9E, 22-00.2N 119-39.7E,
   22-10.5N 119-24.9E, 22-41.1N 119-24.7E,
   22-40.9N 120-12.1E, 21-52.5N 120-45.6E,
   21-17.5N 120-45.3E, 21-05.1N 120-34.7E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 21 JUL 14.

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.
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

154 within 180 nm since 1999 · 2 in the last 12 months · 0 listed in force now

99
00
05
10
15
20
25
26

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

24 cable & pipeline work listed in force · see all

Record snapshot 2026-10-02 01:55Z; 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.