The present invention relates to a liquefied gas carrier having a width of less than 32.3 m to pass through the old Panama Canal, which includes a liquefied gas tank having a liquefied gas storage capacity of 70K or more, preferably 78.7K.

The various example embodiments disclosed herein pertain to an internal support structure in a watercraft that interfaces the motor to the hull and decreases the weight of the hull, by eliminating various components. The various example embodiments add structural stability to the overall structure of the hull or body, allowing for thinner hull and deck material. This chassis consists of a metal, composite, and or plastic bent or formed tubular structure that outlines the internal dimensions of the hull. The motor is able to mount to this structure so that the body is no longer the direct point of attachment. This furthers the structural stability and reliability of the hull as it disperses forces over a larger area and mounts to a means more suitable than direct hull mounts, which often shear and break loose from the traditional fiberglass hulls. By mounting the engine to this chassis, the hull can be completely removed without disassembling and other components. This allows easier access to the motor and ease of internal maintenance, and allows for replacement hulls and decks when damaged.

The various example embodiments disclosed herein pertain to an internal support structure in a watercraft that interfaces the motor to the hull and decreases the weight of the hull, by eliminating various components. The various example embodiments add structural stability to the overall structure of the hull or body, allowing for thinner hull and deck material. This chassis consists of a metal, composite, and or plastic bent or formed tubular structure that outlines the internal dimensions of the hull. The motor is able to mount to this structure so that the body is no longer the direct point of attachment. This furthers the structural stability and reliability of the hull as it disperses forces over a larger area and mounts to a means more suitable than direct hull mounts, which often shear and break loose from the traditional fiberglass hulls. By mounting the engine to this chassis, the hull can be completely removed without disassembling and other components. This allows easier access to the motor and ease of internal maintenance, and allows for replacement hulls and decks when damaged.

A barge, a barge assembly system, and assembly method are provided for assembling a barge that is constructed in component pieces sized to be capable of shipping by road or railway from a first location to a second location adjacent to a body of water for assembly of the barge. The barge assembly system includes a portable assembly device having a variety of frame elements that, when assembled, produce a structure capable of supporting barge section components that are placed thereupon so that the barge may be assembled. The barge assembly system can also include a crane for lifting the barge section components onto a support surface of the portable assembly device.

A large-size floating structure which meets the needs for extending the activities of coastal towns is provided. The architectural and technical design can accommodate several thousand inhabitants, while attracting many visitors and customers to live, work and enjoy varied leisure facilities. This energy-autonomous marine district, which is non-polluting and environmentally friendly, constitutes an example of sustainable development. Each component of the structure of the barge provides a maximum of functions: structural, functional, ecological and architectural. By concentrating all of the activities of a town in a single complex, it is easier and more economical to resolve all the problems of sustainable development and safety than in the habitant next to the coast.

A large-size floating structure which meets the needs for extending the activities of coastal towns is provided. The architectural and technical design can accommodate several thousand inhabitants, while attracting many visitors and customers to live, work and enjoy varied leisure facilities. This energy-autonomous marine district, which is non-polluting and environmentally friendly, constitutes an example of sustainable development. Each component of the structure of the barge provides a maximum of functions: structural, functional, ecological and architectural. By concentrating all of the activities of a town in a single complex, it is easier and more economical to resolve all the problems of sustainable development and safety than in the habitant next to the coast.

Semi-submersibles are subjected to loading from waves, causing racking, longitudinal shear and parallelogramming, or differential movement of the pontoons. The cyclic wave loading makes the various connections, where stress concentrations occur, susceptible to fatigue damage throughout the hull structure. This is most evident at the connections between the braces and the main hull structure. A revised brace to main hull connection with reduced bending stiffness is employed to reduce the moment being transferred from the brace to the hull, thereby reducing the bending stress and susceptibility to fatigue damage. This improved connection employs an internal member to transfer the loads between the brace and hull structure mainly as tension and compression. As a consequence of the improved fatigue performance, the structural weight of the connection can be greatly reduced, thus increasing the capacity with which the semi-submersible hull can operate.

Semi-submersibles are subjected to loading from waves, causing racking, longitudinal shear and parallelogramming, or differential movement of the pontoons. The cyclic wave loading makes the various connections, where stress concentrations occur, susceptible to fatigue damage throughout the hull structure. This is most evident at the connections between the braces and the main hull structure. A revised brace to main hull connection with reduced bending stiffness is employed to reduce the moment being transferred from the brace to the hull, thereby reducing the bending stress and susceptibility to fatigue damage. This improved connection employs an internal member to transfer the loads between the brace and hull structure mainly as tension and compression. As a consequence of the improved fatigue performance, the structural weight of the connection can be greatly reduced, thus increasing the capacity with which the semi-submersible hull can operate.

The invention notably relates to a water surface autonomous vessel having a hull and configured to be connected, through a lead-in cable having a negative buoyancy, to an end of a seismic cable having a neutral buoyancy and adapted for midwater data acquisition, wherein the water surface autonomous vessel comprises a winch for varying the deployed length of the lead-in cable, and the hull of the autonomous vessel forms a conduct at the back of the autonomous vessel in the direction of deployment of the lead-in cable.

This provides an improved solution for seismic prospecting in aquatic mediums.

The invention notably relates to a water surface autonomous vessel having a hull and configured to be connected, through a lead-in cable having a negative buoyancy, to an end of a seismic cable having a neutral buoyancy and adapted for midwater data acquisition, wherein the water surface autonomous vessel comprises a winch for varying the deployed length of the lead-in cable, and the hull of the autonomous vessel forms a conduct at the back of the autonomous vessel in the direction of deployment of the lead-in cable.

This provides an improved solution for seismic prospecting in aquatic mediums.