The Land-Wasser-Schlepper was conceived by Germany as a tracked amphibious tractor in 1936. A small number of this unarmored boat-like vehicle was built and they served on the Eastern Front. However, less well known is the vehicle designed as its successor – the Panzerfahre (abbreviated to "PzF"). The main difference with this vehicle was that it was armored, plus it was conveniently based on the chassis of a Panzer IV Ausf.F tank. Development of the Panzerfahre began in early 1941, and by mid-1942 Magirus had delivered two prototypes. The lightly armored, fully tracked vehicle had a boat-like bow and a propeller at the stern. The vehicle's main function was combat supply on land and in water. It could tow an amphibious trailer, or alternatively it could work in tandem with another Panzerfahre as a floating ferry platform capable of carrying a 24-ton load. However, as heavier tanks appeared on the scene, the Panzerfahre never went into production because of its inadequate payload.