Catamaran type vessel

A catamaran type vessel comprising two rigid side hulls connected by a connector, where the hulls together with the connector constitute a rigid form containing the usable space of the vessel, which is provided with propulsion and control devices, wherein the vessel contains a lowered and lifted platform together with the platform drive unit, where the platform is a separate portion of the aft part of the deck and has the form of a flat frame with a usable overlay fixed on the surface of the frame, and at least one edge of the platform in the upper position cooperates with at least one edge of the aft part of the deck, with the platform frame being attached to the horizontal edges of at least two supports, where the rear vertical edge of each support is connected by axes of rotation with a pair of rigid arms in the pantograph system, and the rigid arms are hollow sections containing vertical axes of rotation attached on the other side of said rigid arms to the vessel hull connector wall, wherein in each pair of the rigid arms in the pantograph system, one arm is a guide arm and the other arm is a fixing arm, in each pair of the arms is connected by means of the axis of rotation with a cylinder piston rod for lowering and lifting the platform, wherein a barrel of said cylinder is tiltingly attached to the fixed part of the vessel structure, in the connector zone between the side hulls,

• wherein the fixed part of the vessel structure, to which the cylinder barrel for lifting and lowering the platform is tiltingly fixed, is the internal surface of the hollow section, which is the support pillar of the aft part of the next level of the vessel.