A water mat for a boat and a boat. The boat may be a pontoon boat. The water mat may include a cut-out. The cut-out may be formed in a forward side of the water mat, with the forward side of the water mat is connected to the stern of the boat such that the outboard motor is positioned in the cut-out of the water mat. A flexible connecting sheet, that is configured to connect the water mat with the boat, may be attached to a connection side of the water mat and extend along the connection side of the water mat.

Techniques and systems to reduce movement of at least one portion of an offshore platform. One portion of the offshore platform can provide a connection to a seafloor. A second portion of the offshore platform provides a lateral force to the first portion of the offshore platform while allowing for vertical movement between the first portion and the second portion of the offshore platform.

A suspension system for a marine vessel, the marine vessel including a body portion at least partially supported relative to at least a left hull and a right hull by the suspension system, the left and right hulls being moveable relative to each other and the body, the suspension system including resilient supports between the body portion and the left and right hulls. The suspension system providing at least a roll stiffness being arranged to provide a roll moment distribution (RMD) of the suspension system wherein roll forces effectively act at a position disposed within a longitudinal distance along the marine vessel from a steady state position of the resultant pressure forces acting on the left and right hulls when the marine vessel is operating in a planing or semi-planing mode. The longitudinal distance can be 20% or less of a waterline length of one of the at least a left and a right hull at design load in displacement mode.

A suspension system for a multi-hulled vessel including: a chassis and at least one left hull and at least one right hull; a front left, a back left, a front right and a back right support arrangements with respective rams; a first adjustment accumulator having a fluid chamber and a gas chamber; and a first actuator to transfer or effectively transfer fluid between the fluid chamber of the first adjustment accumulator and at least one compression chamber of a respective ram of a first support arrangement comprising one or more of the front left, front right, back left or back right support arrangements. A static pressure in the gas chamber of the first adjustment accumulator being within 25% of a static operating pressure in the at least one compression chamber of the at least one ram of the first support arrangement.

A lower deck for a watercraft is attached to and supported by an amidships hull, and an actuator slides the lower deck and amidships hull between a stowed position and an extended position on rails that are secured to the underside frame of the upper deck that is supported by abeam hulls. When fully extended, the lower deck remains attached to the watercraft while a portion of the lower deck's aft section remains beneath the upper deck. A hold within the amidships hull can store accessories used with the watercraft, such as live wells, tables, seats, a foldable slide and ladder assembly, and other items which can be accessed and deployed when the lower deck is extended. The holds are covered by panels which may be individual separable panels, a foldable set of connected panels, or laterally expandable panels. The lower deck can have foldable handrails and recessed cup holders.

A variable trimaran that uses natural power has an outer hull, which is capable of ensuring stability with respect to a center hull in the middle thereof. The variable trimaran can be selectively expanded and contracted in the horizontal and vertical directions thereof. The variable trimaran includes a sail unit, which uses wind power, and a solar power generation unit so as to enable efficient long-term sailing without the use of fossil fuel. To this end, a horizontal and vertical adjustment units are provided for adjusting the position of the outer hull, and the solar power generation unit and the wind power sailing unit are used such that the position of the outer hull can be freely adjusted with respect to the center hull and efficient long-term sailing is enabled without the supply of an oil energy source due to the use of sunlight and wind power as power sources.

A vessel is disclosed having a body portion that is at least partially suspended above at least one left moveable hull and at least one right moveable hull, each hull being moveable with respect to the body portion. At least one sensor is arranged to sense at least one operational parameter of the vessel. The roll attitude of the body portion is adjustable and controlled during operation in response to the at least one operational parameter to ensure that the sum of the gravitational force and the centrifugal force acting on the vessel during a turn has a line of action that is substantially perpendicular to a deck of the vessel, i.e. that the vessel executes a coordinated turn.

The invention relates to an auxiliary floating system for the installation, transport or maintenance of an offshore structure, said structure comprising at least one essentially vertical shaft, wherein said auxiliary floating system comprises: at least one floating element that remains semi-submerged during the process of installing the offshore structure; at least one coupling structure connected to said floating element; and guide elements secured to the coupling structure and in sliding contact with the shaft. Advantageously, the sliding contact between the auxiliary floating system and the shaft is such that it allows essentially vertical relative movement between the auxiliary floating system and said shaft, such that during the process of installing the offshore structure, said structure sinks while the auxiliary floating system remains at essentially the same level on the surface.

An expandable pontoon boat includes a center section, a first side section, and a second side section. First and second telescoping assemblies connect the first side section to the center section, and third and fourth telescoping assemblies connect the second side section to the center section. The telescoping assemblies may be extended and retracted to extend and retract the first and second side sections from the center section, thereby widening and narrowing the boat, respectively.

It relates to an urban craft, which belongs to the industrial sector of nautical vehicles for transportation of crew and passengers in general, composed of a speedboat (1) equipped with a central cab (2), a transparent roof (3), a honeycomb grid (4), an X-shaped structure (5), faceted areas (6), a catamaran hull (7), an inverted nose (8), a negative bow (9), engines (10), a propeller (11), seats (12), safety belts, airbags, acceleration and braking pedals (13), a steering wheel (14), a dashboard (15), a central console (16), a gear shift lever (17), armrests (18), cupholders (19), internet/Wi-Fi access, detachable tablets (20), a lateral boarding platform (21), headlights (22) and lateral arrows in the camera-based rearview mirrors (23), an air-conditioning system, a pneumatic suspension system with adjustable airbags and hydrogen-based shock absorbers, individual (rear and front) lateral doors (24), large gullwing lateral doors (25), an upper airfoil (26), a rear window (27), a foldable rear platform (28) with a step over the propelling devices (29), a central watershed system (30), a panoramic front window (31), a front hood with luggage compartment and access to fuel supply, a rear camera (32).