These early European airboats were significantly different from their modern counterparts. Compared to the airboats of today, early European airboats tended to be somewhat larger, had higher freeboards, and lacked a protective cage surrounding the propeller. They also had a different steering mechanism: early airboats were steered with a rudder in the water controlled by a steering wheel with throttle control provided by a gas pedal, like an automobile. More modern airboats use an air rudder controlled with a joystick for steering.