aircraft powered by a Continental IO-520-D, landplane gross weight and first certified on 24 September 1965. Six seat high wing light aircraft and agricultural aircraft powered by a Continental IO-520-D, landplane gross weight and first certified on 16 October 1973. Military variants U-17A Military version of the Cessna 185E, powered by a 260-hp (194-kW) Continental IO-470-F piston engine. Supplied by the USAF to a number of countries under the Military Assistance Programme. U-17B Military version of the Cessna A185E, powered by a 300-hp (224-kW) Continental IO-520-D piston engine. Supplied by the USAF to a number countries under the Military Assistance Programme. U-17C Four-seat light utility aircraft, powered by a Continental IO-470-L piston engine. Operators Civil operators The Cessna 185 is popular with air charter companies and is operated by private individuals and companies. Military operators As part of the United States Military Assistance Program, Cessna received a contract to supply the United States Air Force with the Skywagon. These were intended for delivery overseas and were designated U-17A and U-17B. Argentine Army Aviation Bolivian Air Force 7 x A185E, 8 x A185F * 5 x U-17A Guardia Civil 3 x U-17A Ecuadorian Army 2 x 185D Hellenic Army 9+ x U-17A Honduran Air Force received a Cessna 185B in 1962, a U-17A in 1963 and a 185D in 1965. Indonesian Air Force Islamic Republic of Iran Air Force 185A – no longer in service Islamic Revolutionary Army Aviation 185A – no longer in service Israel Air Force 185 Jamaica Defence Force – 4 x 185 from 1963 to 1985 Laos Royal Lao Air Force – U-17s used as reconnaissance and observation aircraft for Nokateng Forward Air Controllers during the Laotian Civil War Nicaraguan Air Force 3 x U-17B Panamanian Public Forces 3 x U-17A Paraguayan Air Force 5 x U-17A Peruvian Air Force 9 x 185 Philippine Air Force 8 x U-17A, 9 x U-17B Portuguese Air Force 5 x 185A operated 1968 to 1974. Rhodesian Air Force – Two civil aircraft impressed into service, about 17 aircraft on loan from the South African Air Force, in service during the 1970s. Air Force of El Salvador 1 x 185 South African Air Force 24 x 185A, 12 x 185D, 9 x 185E Republic of Vietnam Air Force – About 100 U-17As and U-17Bs were used by the VNAF. No longer in service. Royal Thai Army Aviation U-17B Royal Thai Navy