The “Seep”: a GPW drivetrain in a boat-shaped steel hull with a propeller and rudder, 12,778 built by Ford in 1942–43, most of them sent to the Soviet Union under Lend-Lease.
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Sparkman & Stephens and Marmon-Herrington designed the amphibious body around GPW mechanicals, with a power take-off driving a propeller and a bilge pump. It was too heavy and low in the water for surf landings and the Army stopped ordering it in 1943; the Soviet Union used most of them on rivers and copied it after the war as the GAZ-46. Ben Carlin drove a modified GPA, Half-Safe, around the world between 1948 and 1958.
Catalogue fields describe the vehicle's structure and body as this registry records it. They are not certified factory measurements, and no performance figures are published here.
Base model variants
Registry record updated 2026-09-22 · status: researched
Open ¼-ton
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