A marine hull including a hull plate manufactured from metal, a set of longitudinal reinforcements and a set of transverse reinforcements, at least one longitudinal reinforcement of the set of longitudinal reinforcements being arranged between the hull plate and at least one transverse reinforcement of the set of transverse reinforcements, and being connected to an inside of the hull plate. The marine hull is characterized in that the hull plate has a thickness that is less than 10 mm, and that the at least one longitudinal reinforcement is manufactured from the same metal as the hull plate and comprises at least one resilient segment arranged to spring in the direction transverse to the thickness of the hull plate, and that the resilient segment is arranged to bottom upon a compression that is more than 10 mm and less than 50 mm.

A marine hull including a hull plate manufactured from metal, a set of longitudinal reinforcements and a set of transverse reinforcements, at least one longitudinal reinforcement of the set of longitudinal reinforcements being arranged between the hull plate and at least one transverse reinforcement of the set of transverse reinforcements, and being connected to an inside of the hull plate. The marine hull is characterized in that the hull plate has a thickness that is less than 10 mm, and that the at least one longitudinal reinforcement is manufactured from the same metal as the hull plate and comprises at least one resilient segment arranged to spring in the direction transverse to the thickness of the hull plate, and that the resilient segment is arranged to bottom upon a compression that is more than 10 mm and less than 50 mm.

A boat includes: a pair of buoyancy units spaced from each other; a bottom plate structure connecting the bottoms of the pair of buoyancy units to each other; and a water storage defined by the pair of buoyancy units and the bottom plate structure, open rearward at the stern to take water from the outside, and keeping the water flowing therein. The boat can keep the balance more stable, is free from a common waterproof problem, and can improve a running ability.

A boat includes: a pair of buoyancy units spaced from each other; a bottom plate structure connecting the bottoms of the pair of buoyancy units to each other; and a water storage defined by the pair of buoyancy units and the bottom plate structure, open rearward at the stern to take water from the outside, and keeping the water flowing therein. The boat can keep the balance more stable, is free from a common waterproof problem, and can improve a running ability.

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 pleasure craft is provided in which one or more decks of the craft have a deck construction in which a base body is provided, and in which a first part of supporting and stiffening members is arranged on an upper face of the base body, and a second part of the supporting and stiffening members is arranged on a lower face of the base body. This construction optimizes and rationalizes the arrangement of components of the installations of the craft in terms of size, weight and the required amount of space, as well as in terms of required power, this resulting in a reduction of time and cost for mounting the installations of the craft.

A pleasure craft is provided in which one or more decks of the craft have a deck construction in which a base body is provided, and in which a first part of supporting and stiffening members is arranged on an upper face of the base body, and a second part of the supporting and stiffening members is arranged on a lower face of the base body. This construction optimizes and rationalizes the arrangement of components of the installations of the craft in terms of size, weight and the required amount of space, as well as in terms of required power, this resulting in a reduction of time and cost for mounting the installations of the craft.