GMC 2.5 Ton, 6x6 Amphiban Truck DUKW "Duck"

(D means 1942, U means utility (amphibious), K means all-wheel drive, W means 2 powered rear axles)

DUKW entering the water (Jeff Skender Photo)

DUKW sailing (Jeff Skender Photo)

DUKW exiting the water (Jeff Skender Photo)

DUKW exiting the water

Video of DUKW sailing