Sub-surface scientific moorings established: a. 38-47.50S 147-03.90E
Bass Strait · HYDROPAC 1149/23
What this record establishes
Archived notice · 2024-01-25 01:24Z
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 81/23 060111Z APR 23.. Issued 2023-04-06 01:56Z. 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
- Bass Strait. The parsed report position is -38.823, 147.175. 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
- issued
- 2023-04-06 01:56Z
- status
- Archived notice
- authority
- AUSCOAST 81/23 060111Z APR 23.
- issued by
- AUSCOAST
- sea
- Bass Strait
- position
- -38.823, 147.175
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BASS STRAIT. AUSTRALIA. DNC 05. SUB-SURFACE SCIENTIFIC MOORINGS ESTABLISHED: A. 38-47.50S 147-03.90E. B. 38-51.30S 147-17.10E. WIDE 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.
- Scientific mooring
- Instruments anchored to the seabed and held up by floats, sometimes just below the surface, left for months to measure the ocean.
- 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
102 within 180 nm since 2001 · 4 in the last 12 months · 2 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 valaris 107/A8GS5 in position 38-17.79S 147-40.57E 2.5 nm clearance requested2026-08-20
- Underwater operations in progress until further notice by M/V pmg emerald in area bound by 39-01.29S…2026-02-12
- Underwater operations in progress until further notice by M/V investigator in area bound by 37-57.00S…2024-05-10
- Underwater operations in progress until further notice by M/V investigator along trackline joining 37-57.00S…2024-05-10
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
- Drill rig valaris 107/A8GS5 in position 38-17.79S 147-40.57E 2.5 nm clearance requestedSurveys · 39.4 nm
- 8 virtual AIS navigation marks in an area bounded by 38-23S to 38-37S and 148-25E to 148-37E inoperativeOther · 65.8 nm
- Special purpose vessel samson explorer / VNW5773 / 503096000 conducting underwater operations in an area…Surveys · 87.5 nm
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-02 01:25Z; 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.