Abstract: An independent vessel tank system for storing liquid gas on a vessel has a first tank member, a second, cylindrical tank member connected to the first tank member, a third tank member connected to the second tank member, wherein the first, second and third tank members provide a tank device for the liquid gas, a first supporting device provided between the third tank member and a hull of the vessel, for supporting the weight of the tank device, and a second supporting device at least partially provided along a periphery of the tank device, for supporting the tank device to the hull of the vessel. The second supporting device is flexible in a first direction parallel to the centre axis of the tank device, and flexible in a second direction perpendicular to the periphery of the tank device.

Abstract: The invention relates to a system for utilization of a sinusoidal pattern of movement for propulsion or energy recovery. The system comprises a plurality of rigid hull elements, completely or partly submerged, arranged in a row, rotatably attached to one another for rotation about parallel axes of rotation across the longitudinal dimension of the row of hull elements. The system further comprises movement devices for rotating the hull elements relative to one another or movement devices for recovery of energy as a result of rotating the hull elements relative to one another.