Seismic survey in progress until further notice by M/V geo celtic towing 7800 meter long cable along…
Indian Ocean · HYDROPAC 285/11
What this record establishes
Archived notice · 2011-01-27 21:27Z
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 26/11 241158Z JAN 11.. Issued 2011-01-24 12:25Z. 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 map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.
Related notices and cancellation links
- issued
- 2011-01-24 12:25Z
- status
- Archived notice
- authority
- AUSCOAST 26/11 241158Z JAN 11.
- issued by
- AUSCOAST
- sea
- Indian Ocean
- position
- -16.475, 118.667
- vessel
- M/V GEO CELTIC · 33 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
AUSTRALIA-NORTHWEST COAST. 1. SEISMIC SURVEY IN PROGRESS UNTIL FURTHER NOTICE BY M/V GEO CELTIC TOWING 7800 METER LONG CABLE ALONG TRACKLINE BETWEEN 18-29S 118-40E AND 14-28S 118-40E. SEVEN MILE BERTH REQUESTED. 2. CANCEL HYDROPAC 242/11.
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.
- 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
10 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.
- Australia-northwest coast DNC 042016-06-24
- Seismic survey in progress until further notice by M/V polarcus alima towing 12 five mile long cables…2013-06-01
- Seismic survey in progress until further notice by M/V aquila explorer towing six mile long cable in area…2012-12-22
- Seismic survey in progress until further notice by M/V aquila explorer towing six mile long cable in area…2012-12-22
- Seismic survey in progress until further notice by M/V polarcus alima towing four mile long cables along…2012-08-18
- Seismic survey in progress until further notice by M/V geo celtic towing 7800 meter long cable along…2011-01-20
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
23 cable & pipeline work listed in force · see all
Record snapshot 2026-10-03 15:02Z; 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.