There’s plenty of room to move around in here. The controls are more or less the same as the land jeep but PTO controls are added for the propeller and bilge pump. The steering wheel controls the front tires and the rudder simultaneously. These canvas seats are incorrect for a GPA. Originally, they would have been leather stuffed with kapok so they could be used as floats. The kapok cushions made the GPA seats among the most plush in the U.S. Army.