Seismic survey in progress until further notice by M/V greatship mamta in 19-16.5S 116-46.5E
Indian Ocean · HYDROPAC 2371/11
What this record establishes
Archived notice · 2011-08-27 05:51Z
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 217/11 221349Z AUG 11.. Issued 2011-08-23 07:47Z. 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
- Indian Ocean. The parsed report position is -19.275, 116.775. 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
- Container adrift in 42-42.8N 178-54.2E at 262050Z auglater cancellation notice
- issued
- 2011-08-23 07:47Z
- status
- Archived notice
- authority
- AUSCOAST 217/11 221349Z AUG 11.
- issued by
- AUSCOAST
- sea
- Indian Ocean
- position
- -19.275, 116.775
- vessel
- M/V GREATSHIP MAMTA · 8 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
AUSTRALIA-NORTHWEST COAST. SEISMIC SURVEY IN PROGRESS UNTIL FURTHER NOTICE BY M/V GREATSHIP MAMTA IN 19-16.5S 116-46.5E. 2.5 MILE BERTH REQUESTED.
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.
- 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.
Collected reports in this area · cable & pipeline work
58 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
- 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
- Pipeline operations in progress until further notice by M/V castorone along trackline joining 20-09.45S…2024-04-19
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 ve constructor / H9YT / 373335000 conducting underwater operations in an area bounded…Surveys · 6.1 nm
- Underwater operations in progress until further notice by vessel ve constructor in area bound by 19-12.00S…Surveys · 6.1 nm
- Special purpose vessel fugro kwilena / MLOV8 / 503147420 conducting underwater operations in an area bounded…Surveys · 92.8 nm
- Special purpose vessel nexans aurora / LALC8 / 257682000 conducting cable laying operations from 19 52.44S…Cable ops · 116.7 nm
Worldwide in the collected sources
24 cable & pipeline work listed in force · see all
Record snapshot 2026-10-02 06:34Z; 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.