Survey operations in progress until further notice by M/V geo coral in area bound by 39-05S 143-13E, 40-29S…
Great Australian Bight · HYDROPAC 2436/21
What this record establishes
Archived notice · 2021-11-01 01:03Z
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 179/21 260806Z AUG 21.. Issued 2021-08-26 08:31Z. 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
- Great Australian Bight. 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
- Cancel HYDROPAC 2436/21 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the Great Australian Bight →
- issued
- 2021-08-26 08:31Z
- status
- Archived notice
- authority
- AUSCOAST 179/21 260806Z AUG 21.
- issued by
- AUSCOAST
- sea
- Great Australian Bight
- position
- -39.783, 143.408
- vessel
- M/V GEO CORAL · 58 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GREAT AUSTRALIAN BIGHT. AUSTRALIA-SOUTHEAST COAST. TASMANIA. DNC 05. SURVEY OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V GEO CORAL IN AREA BOUND BY 39-05S 143-13E, 40-29S 143-13E, 40-29S 143-36E, 39-05S 143-36E. SIX MILE BERTH REQUESTED.
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.
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- 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.
Collected reports in this area · survey operations
69 within 180 nm since 2001 · 3 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.
- Underwater operations in progress until further notice by M/V samson explorer in area bound by 39-47.00S…2026-09-30
- Special purpose vessel samson explorer / VNW5773 / 503096000 conducting underwater operations in an area…2026-09-30
- Drill rig transocean equinox / V7A7397 / 538010767 in position 38-46.20S 142-48.80E 2.5 nm clearance requested2026-08-17
- Survey operations in progress until further notice by M/V offshore solution in area bound by 38-39.00S…2025-01-12
- Underwater operations in progress until further notice by M/V seven sisters in 38-43.58S 142-58.42E2025-01-01
- Underwater operations in progress until further notice by M/V seven pegasus in area bound by 39-11.00S…2024-09-27
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
- Great australian bightCable ops · 26.1 nm
- Special purpose vessel dependable / kdej / 367137000 conducting cable lay operations 10NM either side of…Other · 26.1 nm
- Six meter buoy, yellow, established in 38-47.62S 142-37.77ENav aids · 69.6 nm
- 1 X 6M yellow surface buoy established in position 38-47.62S 142-37.77E 2.5NM clearance requestedNav aids · 69.6 nm
- 2 X 6M yellow surface buoys fl.white 3S temporarily established within 1.0NM of position 38-47.19S…Nav aids · 70.7 nm
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-03 01:02Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
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.