The ZIS-485, army designation BAV (Russian, БАВ, большой автомобиль водоплавающий - bolshoi avtomobil vodoplavayushchiy, big floating vehicle), is a Soviet amphibious transport, a copy of the WWII American DUKW.During World War II, the Soviets received 586 DUKW-353 amphibious trucks under the Lend-Lease Act.Due to lack of own experience, the DUKW was copied, although with improvements enhancing its capability.[6] Introduced in 1952,[7] it was intended to complement the GAZ-46 4x4 amphibious reconnaissance vehicle, but using the ZIS-151 6x6 truck (also used in the BTR-152)[8] as its basis.[10] In use by the Soviet Union and its allies and client states the BAV was gradually replaced by the much larger tracked PTS amphibious vehicles.