sentences:  The "Leeuwin"s were the first RAN ships to use a multi-crewing concept, with three complements used to operate the two vessels.The two ships were ordered from NQEA Australia on 2 April 1996, and built at the company's shipyard in Cairns, Queensland.Construction of commenced in August 1996, and she was launched in July 1997, while was laid down in May 1997 and launched in June 1998.