HMAS Leeuwin (HS 01/A 245) is the lead ship of the Leeuwin-class of hydrographic survey vessels operated by the Royal Australian Navy (RAN).

[1] The sonars and echo sounders allow the vessels to chart waters up to 6,000 metres (20,000 ft) deep.

[1] The Leeuwin class were the first RAN ships to use a multi-crewing concept,[citation needed] with three complements used to operate the two vessels.

[5] Leeuwin sailed to Fiji in July 2015 for a seabed-mapping operation around Rotuma Island.

[6] This was the first RAN deployment to the region in eight years, since the deterioration of ties between the nations after the 2006 Fijian coup d'état.