The present invention is an air cushion vehicle and a control mechanism for steering and turning the vehicle. The air cushion vehicle includes a frame having a skirt body extending around the perimeter. An air flow generator may be positioned on the frame for providing a lift flow and thrust flow. At least one vane is disposed on the frame to direct the thrust flow. At least one fin is disposed on the frame downstream of the vane for directing the thrust flow. A turning controller may be used for moving the vane and fin in a coordinating movement to affect the direction or the motion of the air cushion vehicle.