The Bulli was an iron screw steamer that struck an uncharted rock in the Kent Group on 27 July 1877. The Marine Life Network guide records that an attempt to salvage her with wooden pontoons failed during a gale, and that she was declared a historic wreck in 1990. It rates her 8 out of 10: the hull stands about 5 m off a sandy bottom in 13-16 m, 200 m from shore, orientated north-east to south-west, reasonably intact but broken amidships with her coal cargo spilling out. The well-lit wreck is covered in colourful growth and attracts abundant fish, making it very photogenic. Damage from a naval anchor strike is visible, and many artefacts have been removed, although observant divers may still spot some. The Marine Life Network guide's descriptions are the only detailed published account, so expect some changes in the decades since and plan to explore.

The Kent Group is one of the most isolated island groups in Australian waters, protected as the Kent Group National Park on land, with the surrounding waters managed as a marine reserve. It sits in the middle of Bass Strait where warm and cool currents mix, and its granite walls and clear water support rich invertebrate growth rarely seen by divers. The historic Deal Island lighthouse (1848), once the highest in the southern hemisphere, overlooks the anchorages.

With no facilities beyond the caretakers' station and a long passage back to the mainland or Flinders Island, any diving injury is a serious emergency requiring aeromedical evacuation, most likely to Melbourne's Alfred Hospital. Diving here is for experienced, completely self-sufficient expedition divers.

The Kent Group (Deal, Erith and Dover islands and outliers) lies in central Bass Strait about 55 km north-west of Flinders Island and roughly 90 km south of Wilsons Promontory. There is no scheduled transport: divers arrive on private yachts or expedition charters from Port Welshpool (Victoria), Flinders Island or north-east Tasmania, a passage of 6-12 hours depending on departure point. Murray Pass, the channel between Deal and Erith islands, offers the main anchorages (West Cove, East Cove); volunteer caretakers live on Deal Island, and landing and camping are managed by the Parks and Wildlife Service.

The Bulli lies in Murray Pass near West Cove, about 200 m from shore, a short tender ride from the West Cove anchorage. Dive near slack water.

Central Bass Strait is notorious for sudden gales: westerly and south-westerly fronts and strong easterlies can arrive with little warning, and Murray Pass runs a strong tidal current that sweeps the headlands of West and East coves. January-April offers the most settled weather; after a gale, strong surface currents persist through the strait. Anchorages in Murray Pass give shelter from most directions except along the pass.

Murray Pass current sweeps the wreck; time dives for slack.

Descend at slack to the hull (orientated NE-SW), explore along both sides and the break amidships where the coal cargo spills out, and ascend before the current resumes. Turn the dive at half gas (thirds where current or overhead sections are involved), deploy an SMB before surfacing for the live-boat pick-up, and complete a 3-minute safety stop at about 5 m where depth allows.

No operator. Visited only by private yachts and occasional expedition charters (typically from Port Welshpool in Victoria or from Flinders Island); full self-sufficiency required, including compressor or ample cylinders.