Collins-class Submarine

The Collins class is Australia's current diesel-electric submarine fleet, one of the most capable conventional submarines in the world. Armed with Mk48 torpedoes and Sub-Harpoon missiles, its size gives it an excellent sensor suite and weapons payload. Being maintained under Life of Type Extension until Virginia-class SSNs arrive under AUKUS.

Six boats built 1990-2003 at Techport, Adelaide. Swedish Kockums design highly modified for Australian requirements. Experienced significant noise and reliability issues early in service, largely resolved. Australia cancelled the French Attack-class replacement program in 2021 for AUKUS nuclear submarines.