Underwater operations in progress until further notice by M/V ile de brehat along trackline between 40-12S…
Great Australian Bight · HYDROPAC 3837/18
What this record establishes
Archived notice · 2018-10-24 22:24Z
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 246/18 220952Z OCT 18 - AUSCOAST 244/18 CX 220947Z OCT 18.. Issued 2018-10-22 12:56Z. 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 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
- Underwater operations in progress until further notice by M/V ile de brehat along trackline between 39-30S…cancelled by this notice
- Cancel HYDROPAC 3837/18 and this msglater cancellation notice
Current notices and reporting history in the Great Australian Bight →
- issued
- 2018-10-22 12:56Z
- status
- Archived notice
- authority
- AUSCOAST 246/18 220952Z OCT 18 - AUSCOAST 244/18 CX 220947Z OCT 18.
- issued by
- AUSCOAST
- sea
- Great Australian Bight
- position
- -39.783, 140.367
- vessel
- M/V ILE DE BREHAT · 29 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-SOUTH COAST. DNC 05. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V ILE DE BREHAT ALONG TRACKLINE BETWEEN 40-12S 137-14E TO 39-22S 143-30E. THREE MILE BERTH REQUESTED. 2. CANCEL HYDROPAC 3803/18.
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.
- 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 · survey operations
41 within 180 nm since 2004 · 1 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.
- 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
- Underwater operations in progress until further notice by M/V mma coral in 38-39.90S 142-58.60E2024-03-18
- Underwater operations in progress until further notice by M/V mma coral in 38-46.59S 142-58.20E2024-03-13
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
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.