Cable ops

Seismic survey 16 mar thru 16 apr by M/V cgg amadeus towing eight 6000 meter long cables in area bound by…

South China Sea · HYDROPAC 906/15

What this record establishes

Archived notice · 2015-04-15 11:20Z

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 179/15 150532Z MAR 15.. Issued 2015-03-15 06:47Z. 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
2015-03-15 06:47Z
status
Archived notice
authority
NAVAREA XI 179/15 150532Z MAR 15.
NAVAREA
NAVAREA XI · named as the source of this relay
sea
South China Sea
position
13.819, 109.817
vessel
M/V CGG AMADEUS · 180 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SOUTH CHINA SEA.
VIETNAM.
DNC 11, DNC 23.
1. SEISMIC SURVEY 16 MAR THRU 16 APR BY M/V
   CGG AMADEUS TOWING EIGHT 6000 METER LONG
   CABLES IN AREA BOUND BY
   15-05N 109-30E, 15-05N 110-00E,
   11-50N 110-00E, 11-50N 109-48E,
   14-00N 109-48E, 14-00N 109-30E.
2. CANCEL THIS MSG 17 APR 15.

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.
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.
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

21 within 180 nm since 2001 · 0 in the last 12 months · 0 listed in force now

01
05
10
15
19

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 2026-10-01 23:33Z; 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.