MV Andrew Wilson Opens as South Australia’s Newest Ship Reef

South Australia has deliberately sunk the retired dredger MV Andrew Wilson approximately six kilometres off Brighton, giving Adelaide-area divers a new artificial reef in comparatively shallow water.

The 40-metre grab hopper dredger settled upright on a sandy seabed with its upper structure about 20 metres below the surface. The September 7 operation was the first deliberate vessel scuttling in South Australian waters in more than two decades. State marine-safety information says the wreck passed its post-sinking inspection and is now open for recreational diving.

Officials describe the site as suitable for divers holding an entry-level scuba qualification, but that description should not be read as a blanket endorsement of wreck penetration. The prepared vessel includes openings and routes through spaces such as the engine room, galley and bridge. Divers should still obtain current coordinates and local briefings, assess sea state and visibility, remain within their training, and treat any overhead section as a wreck environment requiring appropriate skills and equipment.

The vessel was donated by Maritime Constructions and prepared over several months. Crews removed hazardous materials, stripped selected internal walls, cut access openings and deep-cleaned the hull in consultation with South Australia’s Environment Protection Authority and an independent specialist. The state says the work followed international vessel-reef guidance.

A 12-month prohibition on recreational and commercial fishing within 200 metres of the wreck is intended to give fish and marine growth time to establish. The project forms part of the Australian and South Australian governments’ AU$165 million response to the harmful algal bloom that has damaged marine life and habitat across the state. Artificial structure cannot replace lost natural reef, kelp or seagrass, so claims of ecological recovery will need to be tested through long-term monitoring.

Built in 1962, MV Andrew Wilson spent more than six decades supporting dredging and marine construction. It also assisted the salvage response after the Whyalla Airlines Flight 904 crash in Spencer Gulf in 2000. Its new role therefore combines a purpose-built dive attraction with a final chapter in South Australian maritime history.