A method for controlling a marine vessel having first and second steering nozzles and first and second trim deflectors comprises generating at least a first set of actuator control signals and a second set of actuator control signals. The first set of actuator control signals is coupled to and controls the first and second steering nozzles, and the second set of actuator control signals is coupled to and controls the first and second trim deflectors. The acts of generating and coupling the first set of actuator control signals and the second set of actuator control signals result in inducing any of a net yawing force, a net rolling force, and a net trimming force to the marine vessel without inducing any other substantial forces to the marine vessel by controlling the first and second steering nozzles and the first and second trim deflectors. Also disclosed is a system for controlling a marine vessel.

Disclosed is a device that engages and stabilizes a personal watercraft for boarding or exiting. The device simultaneously engages upper surface elements of the watercraft whilst also providing firm land/pier engaged support to the user. A user's weight is able to bear against the inherent buoyancy of the watercraft through a structure rotated downwardly to the watercraft; the rotated structure is hinged and fixed to the land/pier. During entry, the upwardly urging buoyancy of the watercraft stabilizes the watercraft against the downwardly rotated structure while a user steps from the land/pier to the watercraft and fully transfers weight to the watercraft. Exit is the reverse. A method of associated use is also disclosed.

Disclosed is a device that engages and stabilizes a personal watercraft for boarding or exiting. The device simultaneously engages upper surface elements of the watercraft whilst also providing firm land/pier engaged support to the user. A user's weight is able to bear against the inherent buoyancy of the watercraft through a structure rotated downwardly to the watercraft; the rotated structure is hinged and fixed to the land/pier. During entry, the upwardly urging buoyancy of the watercraft stabilizes the watercraft against the downwardly rotated structure while a user steps from the land/pier to the watercraft and fully transfers weight to the watercraft. Exit is the reverse. A method of associated use is also disclosed.

Waves introduce stresses in a floating object, such as a pontoon. The stresses can be introduced by multiple mechanisms, such as waves crashing onto the pontoon, an imbalance in buoyancy and weight load causing hogging and sagging Alternating movements and stresses may result in fatigue in the material. Multiple pontoons can be moored next to each other. When placed on a body of water with a higher wave intensity, such as open sea, the wave induced motions and stresses may cause failures in the pontoons or connections between individual pontoons. A network of pontoons is provided, interconnected with connection modules. The connection modules allow the network of pontoons to resist the loads and movements from the waves or to follow the shape of the, thus preventing failures in the connection modules and in the pontoons. The pontoons may be used to provide a mounting surface for photovoltaic panels.

Waves introduce stresses in a floating object, such as a pontoon. The stresses can be introduced by multiple mechanisms, such as waves crashing onto the pontoon, an imbalance in buoyancy and weight load causing hogging and sagging Alternating movements and stresses may result in fatigue in the material. Multiple pontoons can be moored next to each other. When placed on a body of water with a higher wave intensity, such as open sea, the wave induced motions and stresses may cause failures in the pontoons or connections between individual pontoons. A network of pontoons is provided, interconnected with connection modules. The connection modules allow the network of pontoons to resist the loads and movements from the waves or to follow the shape of the, thus preventing failures in the connection modules and in the pontoons. The pontoons may be used to provide a mounting surface for photovoltaic panels.

A liquid-stabilizing apparatus for a liquid cargo tank includes a guide structure. The guide structure is provided with a positioning floating body. The positioning floating body is provided with anti-sloshing members. The anti-sloshing members are provided with discontinuous baffles at a fixed angle. By using the liquid-stabilizing apparatus, the liquid cargo tank is no longer required to have a bevel surface structure, thereby increasing load capacity of the liquid cargo tank and preventing the liquid cargo tank in various loading states from being impacted by liquid cargos.

A liquid-stabilizing apparatus for a liquid cargo tank includes a guide structure. The guide structure is provided with a positioning floating body. The positioning floating body is provided with anti-sloshing members. The anti-sloshing members are provided with discontinuous baffles at a fixed angle. By using the liquid-stabilizing apparatus, the liquid cargo tank is no longer required to have a bevel surface structure, thereby increasing load capacity of the liquid cargo tank and preventing the liquid cargo tank in various loading states from being impacted by liquid cargos.

A marine vessel (100) comprising: propulsion means (118, 134); a hull section (102); a body section (104) connected to said hull section via at least one stanchion (106, 108, 110, 112); and the body section and the hull section being movable relative to each other via said at least one stanchion.

A marine vessel (100) comprising: propulsion means (118, 134); a hull section (102); a body section (104) connected to said hull section via at least one stanchion (106, 108, 110, 112); and the body section and the hull section being movable relative to each other via said at least one stanchion.

The disclosure provides a wave sheltering vessel used to reduce the significant wave height of waves. The wave sheltering vessel includes a hull, a plurality of anchors, and a propeller system. A length of the hull is greater than or equal to 60 meters. A ratio of the length to a design draft of the hull is less than or equal to 6.5. A ratio of the length to a breadth of the hull is less than or equal to 3.5. A ratio of the breadth to the design draft of the hull is less than or equal to 2.3. The anchors are installed at the hull along a longitudinal direction of the hull. The propeller system is disposed at the hull.