PURPOSE: To absorb the force generated between a hull and a seat by providing a shock absorbing means which is mounted between the hull and the seat to absorb the force generated by the motion of the seat relative to a hull portion when a watercraft travels on the water.
CONSTITUTION: A seat 24 is mounted on a hull 22 in a vertically movable manner in a cantilever beam structure by a steel or aluminum pivot pin 26. A shock absorber comprises a cylinder 46 filled with air or oil, and a piston mounted so as to be movable in the cylinder 46. The characteristic of absorbing the shock in the shock absorber is dependent on both characteristic in the combination of the cylinder 46 filled with air or oil with the piston. The seat 24 of the cantilever beam structure forms an angle in the direction substantially along the moving direction by the vibration from its neutral position, and the shock absorber is mounted on the seat in a correlating manner.
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