After deciding that its Mark 46 torpedoes were inadequate, Australia set up the JP2070 project in 1998 to buy torpedoes for its Adelaide-class frigates, Anzac-class frigates, AP-3C Orion aircraft, S-70B-2 Seahawk helicopters and planned SH-2G(A) Super Seasprite helicopters.[6] The Seasprites were cancelled and the Orions and Seahawks were removed from the MU90 programme on budget grounds; their replacements, the P-8 Poseidon and MH-60R Seahawk will use the US Mark 54 torpedo.[6] The A$639m[6] project to buy a classified number of MU90 has been heavily criticised by the Australian National Audit Office on the grounds of cost, insufficient test firings which failed to reveal defects in the torpedo, and the lack of commonality with the Navy's air-launched torpedoes. The MU90 reached IOC in November 2012.[6]