The Seasprite was originally developed in the late 1950s as a utility helicopter. First flight was in 1959 and UH-2A and B models performed vertical replenishment and SAR for the US Navy. These early models were powered by a single T58 turboshaft but after 1968 survivors were rebuilt with two of the same engine. In 1970 the UH-2 was selected to form the basis of the LAMPS (Light Airborne Multi-Purpose System) as the SH-2D. Twenty aircraft were converted to this standard which saw the fitting of a search radar, a MAD and a removable sonobouy launcher. From 1973 Kaman converted 88 Seasprite to SH-2F configuration featuring uprated engines, new radar and a towed MAD. A further 52 new build SH-2Fs were delivered from 1981. The ultimate development of the line is the SH-2G Super Seasprite. This model features new T700 turboshafts as used on the Sikorsky S-70 range, a new cockpit layout with modern displays, a new acoustic processor and a new tactical management system. First flight was in 1985 and six new build and 18 conversions equip two US Navy Reserve squadrons. In 1997 the design was further improved when Australia and New Zealand ordered the Super Seasprite to equip their ANZAC frigates. Australia's SH-2G(A) aircraft will have a Litton designed two crew cockpit with LCD displays. Sensors will include a new APS-143 radar, FLIR and an ESM system. The aircraft will be able to fire the Penguin ASM. New Zealands SH-2G(NZ) will be similar but fire the AGM-65 Maverick instead.