 The "Collins" class submarines were built by the Australian Submarine Corporation at Adelaide, South Australia and entered service between 1996 and 2003 following extensive trials and modifications to the early boats in the class.The dedicated trials and submarine rescue ship supported these trials between 1992 and 1998.Tests conducted on after she was provisionally commissioned in 1996 revealed serious shortcomings in the submarine's performance, including excessive hull noise and an ineffective combat system.