Surveys
Underwater operations in progress until further notice by M/V siem topaz in area bound by 39-05.00S…
Great Australian Bight · Australia-southeast Coast · HYDROPAC 722/21
- issued
- 2021-03-05 05:17Z
- status
- cancelled 2021-04-09 02:20Z (archive)
- authority
- AUSCOAST 43/21 050440Z MAR 21.
- sea
- Great Australian Bight
- position
- -39.106, 142.948
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
GREAT AUSTRALIAN BIGHT. AUSTRALIA-SOUTHEAST COAST. DNC 05. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V SIEM TOPAZ IN AREA BOUND BY 39-05.00S 142-55.75E, 39-07.75S 142-55.75E, 39-07.75S 142-58.00E, 39-05.00S 142-58.00E. THREE MILE BERTH REQUESTED.
This area · survey operations
52 within 180 nm since 2001 · 1 in the last 12 months · 1 in force now
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26
- Drill rig transocean equinox / V7A7397 / 538010767 in position 38-46.20S 142-48.80E 2.5 nm clearance requested2026-08-17
- 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
- Underwater operations in progress until further notice by M/V mma coral in 39-13.00S 142-52.50E2024-03-07
- Underwater operations in progress until further notice by M/V mma coral in 39-06.49S 142-57.09E2024-03-04
- Underwater operations in progress until further notice by M/V mma coral in area bound by 38-38.00S…2024-02-28
Season · when survey operations happen here
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month of issue, all years in the archive
Timeline
- Cancel HYDROPAC 722/21 and this msg, operations completedcancelled by · 2021-04-09
Nearby now · within 120 nm
- Special purpose vessel dependable / kdej / 367137000 conducting cable lay operations 10NM either side of…Other · 15 nm
- Drill rig transocean equinox / V7A7397 / 538010767 in position 38-46.20S 142-48.80E 2.5 nm clearance requestedSurveys · 21.1 nm
- 12 six meter buoys, yellow, fl w 3 sec, established in area within two miles of 38-46.00S 142-48.80ENav aids · 21.3 nm
- 12 X 6M yellow surface bouys, fl white 3S depolyed within 1.5NM of position 38-46.00S 142-48.80EOther · 21.3 nm
- Six meter buoy, yellow, established in 38-47.62S 142-37.77ENav aids · 23.9 nm
- 1 X 6M yellow surface buoy established in position 38-47.62S 142-37.77E 2.5NM clearance requestedNav aids · 23.9 nm
- Great australian bightCable ops · 89.6 nm
Worldwide now
86 survey operations in force · see all
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.