1.1 Passenger quota
The ship has 4 crew members and 2 crew members.
1.2 Speed
Under full load and displacement, the speed that the ship can reach in still water with the maximum continuous propulsion power is 18kn.
According to Rule 1.1.5.1, the ship whose maximum speed meets V≥7.19▽0.1667=8.17kn and V≥10kn belongs to High-speed boat.
Own ship V=18kn>8.17kn, and>10kn, so this ship is a high-speed ship, and the first row of seats is equipped with safety belts.