The ZiS-485, army designation BAV (Russian, большой автомобиль водоплавающий - bolshoi avtomobil vodoplavayushchiy, big floating vehicle), is a Soviet amphibious transport. Introduced in 1952, 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) as its basis. Similar in size to the DUKW, which it resembles, the BAV has a rear tail gate making loading and unloading easier, rather than all cargo being loaded over the side by crane. The cargo body is open, but a canvas cover is available.