Seismic survey in progress until further notice by M/V western trident towing four mile long cable in areas:…
Indian Ocean · HYDROPAC 1617/07
What this record establishes
Archived notice · 2007-09-24 09:13Z
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) · AUSCOAST 259/07 210246Z SEP 07.. Issued 2007-09-21 08:30Z. 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
- Indian Ocean. The parsed report position is -20.622, 114.800. 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
- issued
- 2007-09-21 08:30Z
- status
- Archived notice
- authority
- AUSCOAST 259/07 210246Z SEP 07.
- issued by
- AUSCOAST
- sea
- Indian Ocean
- position
- -20.622, 114.800
- vessel
- M/V WESTERN TRIDENT · 92 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 WESTERN TRIDENT TOWING FOUR MILE LONG
CABLE IN AREAS:
A. ALONG TRACKLINE BETWEEN 19-20.0S 114-22.0E
AND 20-37.3S 114-48.0E.
B. WITHIN 20 MILES OF 20-37.3S 114-48.0E.
FIVE MILE BERTH REQUESTED.
2. CANCEL HYDROPAC 1599/07.
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.
- 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.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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
69 within 180 nm since 1999 · 2 in the last 12 months · 1 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.
- Cable operations in progress until further notice by M/V nexans aurora in vicinty of trackline joining…2026-09-15
- Special purpose vessel nexans aurora / LALC8 / 257682000 conducting cable laying operations from 19 52.44S…2026-09-15
- Pipeline operations in progress until further notice by M/V castorone along trackline joining 19-51.80S…2024-09-27
- Cable operations in progress until further notice by M/V castorone along trackline joining 20-03.20S…2024-05-10
- Cable operations in progress until further notice by M/V castorone along trackline joining 20-04.90S…2024-05-02
- Cable operations in progress until further notice by M/V castorone along trackline joining 20-06.69S…2024-04-26
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
- Special purpose vessel nexans aurora / LALC8 / 257682000 conducting cable laying operations from 19 52.44S…Cable ops · 23.5 nm
- Drill rig jansz FCS/995031119 in position 19-52.73S 114-36.50E 2.5 nm clearance requestedSurveys · 45.9 nm
- Special purpose vessel fugro kwilena / MLOV8 / 503147420 conducting underwater operations in an area bounded…Surveys · 52.6 nm
Worldwide in the collected sources
23 cable & pipeline work listed in force · see all
Record snapshot 2026-10-03 17:06Z; 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.