Seismic survey in progress until further notice by M/V cgg harmattan towing six 6500 meter long cables in…
South China Sea · HYDROPAC 686/07
What this record establishes
Archived notice · 2007-10-06 04:16Z
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) · SPOCC 170500Z APR 07; AUSCOAST 41/07 CX; AUSCOAST 68/07 CX.. Issued 2007-04-17 08:52Z. 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
- Seismic survey in progress until further notice by M/V veritas voyager towing four two mile long cables in…cancelled by this notice
- RACON at troubridge hill light 35-10.0S 137-38.5E unreliablecancelled by this notice
- Seismic survey in progress until further notice by M/V cgg harmattan towing six 6500 meter long cables in…later cancellation notice
Current notices and reporting history in the South China Sea →
- issued
- 2007-04-17 08:52Z
- status
- Archived notice
- authority
- SPOCC 170500Z APR 07; AUSCOAST 41/07 CX; AUSCOAST 68/07 CX.
- issued by
- SPOCC
- sea
- South China Sea
- position
- 10.714, 109.959
- vessel
- M/V CGG HARMATTAN · 473 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. SEISMIC SURVEY IN PROGRESS UNTIL FURTHER NOTICE BY
M/V CGG HARMATTAN TOWING SIX 6500 METER LONG
CABLES IN AREAS BOUND BY:
A. 11-27.55N 109-37.43E, 11-04.07N 109-37.22E,
11-03.39N 109-50.50E, 11-28.04N 109-50.36E.
B. 10-55.43N 109-49.12E, 10-30.39N 109-48.33E,
10-30.19N 110-06.35E, 10-55.30N 110-06.44E.
WIDE BERTH REQUESTED.
2. CANCEL HYDROPAC 422/07(74), SURVEY COMPLETED.
3. CANCEL HYDROPAC 679/07(75), AID RESTORED.
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.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
Collected reports in this area · cable & pipeline work
72 within 180 nm since 2001 · 0 in the last 12 months · 0 listed in force now
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.
- Pipeline operations 10 jun thru 31 oct by M/V nile river in vicinity of trackline joining 10-22.2N…2020-06-05
- Pipeline operations in progress until 11 sep by M/V nile river in vicinity of trackline joining 10-22.19N…2020-03-30
- Cable operations in progress until 31 dec 19 by cableship responders along trackline joining 13-44.90N…2019-11-28
- Survey and pipeline operations in progress until 15 oct by M/V ptsc thang long along trackline joining…2019-04-18
- Cable operations 19 thru 28 sep by cableship lodbrog in vicinity 09-02.6N 108-18.9E2017-09-17
- Cable repair operations in progress until 07 feb by cableship cable retriever in area bound by 09-46.5N…2017-01-25
Month of issue in the collected archive
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 23:31Z; 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.