 ACDS Block 0 was deployed in nine aircraft carriers, five "Wasp"-class amphibious assault ships, and all five "Tarawa"-class amphibious assault ships.The first installation of ACDS Block 1 began in FY 1996 with the USS "Eisenhower" (CVN-69) and "Wasp" (LHD-1), followed by the USS John F. Kennedy (CV-67) in 1999 and USS "Iwo Jima" (LHD-7) and USS "Nimitz" (CVN-68) in 2001.ACDS will be replaced with the Ship Self-Defense System (SSDS) Mark 2 as it is fielded across the fleet.