Underwater operations in progress until further notice by M/V samson explorer in area bound by 34-56.30S…
Great Australian Bight · HYDROPAC 1163/24
What this record establishes
Archived notice · 2024-04-24 22:58Z
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 121/24 110208Z APR 24.. Issued 2024-04-11 03:04Z. 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
- Underwater operations in progress until further notice by M/V samson explorer towing 900 meter long cables…cancelled by this notice
- Cancel HYDROPAC 1163/24 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the Great Australian Bight →
- issued
- 2024-04-11 03:04Z
- status
- Archived notice
- authority
- AUSCOAST 121/24 110208Z APR 24.
- issued by
- AUSCOAST
- sea
- Great Australian Bight
- position
- -35.522, 137.134
- vessel
- M/V SAMSON EXPLORER · 11 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. DNC 05. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V SAMSON EXPLORER IN AREA BOUND BY 34-56.30S 135-46.92E, 36-06.38S 135-46.92E, 36-06.38S 138-29.20E, 34-56.30S 138-29.20E. THREE MILE BERTH REQUESTED. 2. CANCEL HYDROPAC 626/24.
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.
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- 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.
- 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 · survey operations
3 within 180 nm since 2020 · 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.
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
50 survey operations listed in force · see all
Record snapshot 2026-09-25 00:47Z; 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.