Abstract: A catamaran-type air cushion craft has two floats (211) arranged spaced apart parallel to one another which are connected together at the top by a connecting structure which carries built-in structures and which is sealed at the bottom by an air-tight transverse deck (216). The connecting structure includes at least two double transverse trussed girders (217) arranged spaced apart behind one another, which at least partially contain transverse hollow cavities (212) for passageways and line accomodating hollow cavities (213, 213'), with containers (214) and longitudinal passage and supply elements (215) being mounted at the front and/or rear sides of the double transverse trussed girders.

Abstract: In a multiple-hulled marine craft an opening (313) which can be closed in air-tight and water-tight manner by pivotable flaps (314) is located in the transverse deck (312) beneath the connection structure between the two floats (311) (FIG. 2).

Abstract: An engine installation for ships with a prefabricated box-like engine module container with an engine and a transmission installed therewithin. The module encloses the engine and the transmission, and has a shaft installation for connection to a main propeller of the ship. The prefabricated module is suspended from an upper portion thereof by force bearing members rigidly mounted on the ship. Between the module and torque transmission equipment rigidly mounted on the hull, there is an axial-radial alignment equalization torque transmitting link.

Abstract: A catamaran air cushion water vehicle has two spaced apart floats (111) which extend parallel to one another in the direction of travel, wherein the cross-sections of the floats become broader from the bottom to the top and wherein the floats are rigidly connected together at the top by a deck structure (113). Furthermore, resilient skirts (123, 124) are arranged up to the stem and at the stern between the floats (111), extend at least approximately down to the water surface, and, together with the floats (111), bound an air space (125) between the base of the deck structure and water surface. In accordance with the present teaching the floats (111) each have a hull section (112) which broadens out in step-like manner essentially above their float region (115) which is submerged during travel in the displacement mode. The hull sections (112) serve to accommodate machinery, such as the propulsion units, and the deck structure (113) is attached to the upper end regions of the hull sections (112).

Abstract: An exhaust gas system for a ship having at least one internal combustion engine for moving the ship through water, which exhaust gas system includes a first gas passage for conducting engine exhaust gases below the water surface and a second gas passage for conducting the engine exhaust gases above the water surface, and including a control valve responsive to the position of the ship in the water for determining the selection of the first gas passage or the second gas passage to conduct those exhaust gases, with a cooling member provided for the gases conducted by the first passage and having openings to the water for aspirating or passing the water through the cooling member when the ship moves through the water.