 The design of the car was a departure from that of other SS types.It was streamlined, boat-shaped and watertight, was floored from end-to-end, and was enclosed with sides of fabric-covered 8-ply wood or aluminium.The car was comfortable and accommodated a 3-man crew – the forward position being occupied by the wireless operator/gunner with the pilot seated amidships, and the engineer was stationed at the rear.