A modest refit would have allowed the WWII-era "Newfoundland", "Ceylon" and "Belfast" to run until 1966. Worse the three Tiger cruisers, while virtually identical, externally, were three unique ships electrically, and only "Tiger" saw significant service in gun configuration. was essentially an experimental cruiser with very fast all-electric turrets to engage Mach 2.5 air targets with RP 55 degrees/second, training and elevation, in reserve in 1963 for lack of 85 technical staff including 31 electricians. At the same time the new County, "Leander" and "Tribal" class – all with significant manpower requirements – were commissioning. after eight years in Gareloch had deteriorated before reconstruction as a "Tiger" and had to be withdrawn from operations "East of Suez" in 1963 due to boiler, mechanical and gun-jamming problems. HMNZS , with many RN crew, was reactivated as a surface escort for carrier groups in Southeast Asia in 1964 to deter the threat of the Indonesian "Sverdlov"; and in a brief tour in 1965 to support the amphibious carriers with AD and GFS potential, but by 1966 "Royalist", like "Blake" and "Lion", was unsustainable in the year of maximum danger in the confrontation with Indonesia. The large RN s were refitted with MRS3 fire-control in 1961–65 to provide a substitute for the failed "Tiger" cruisers (the final RAN Daring upgrade in 68–71 to "Vampire" and "Vendetta" with new Dutch Radar and Fire Control and Operations room, delivered a "Daring"-cruiser) to counter the "Sverdlov"s and Indonesian destroyers. The Darings' three main turrets gave them an advantage over the "Tigers" two turrets, guaranteeing at least one was available. The AD modernised s, and the County-class destroyers also substituted for the "Tiger"s in ground support and fleet-escort roles.