HMAS Flinders

HMAS Flinders (A 312), named for Matthew Flinders (1774-1814), was a hydrographic survey ship of the Royal Australian Navy (RAN).

Flinders was laid down by HMA Naval Dockyard at Williamstown, Victoria on 11 June 1971. She was launched on 29 July 1972 and commissioned into the RAN on 27 April 1973.

Following the destruction of Darwin by Cyclone Tracy during the night of 24-25 December 1974, Flinders was deployed as part of the relief effort; Operation Navy Help Darwin. She sailed from Cairns on 26 December, and as the first ship to arrive, Flinders was tasked with surveying the harbour to work out the position of wrecks and the safest areas for the other RAN ships to anchor.

Flinders was decommissioned in 1998. After decommissioning she was sold to a private party and remodeled into a luxury super yacht. Her current name is "M/Y Plan B".