A boat hull has one or more track systems integral with a main body of the boat hull, each track system having a longitudinally extending channel comprising: a longitudinally extending channel body; and a longitudinally extending channel opening in communication with the channel body, wherein the channel body is wider in cross-section than the channel opening, the channel body is adapted to receive a fastener which has a portion that is wider in cross section than the channel opening, thereby preventing the fastener from being withdrawn from the channel body through the channel opening, and wherein the fastener can be selectively secured to the track system at a selected longitudinal position. The track systems can be used for mounting boat hull structural parts and other parts and accessories.

Marine vessels, including combatant (naval) vessels are produced inexpensively without requiring the use of as many skilled personnel as is conventional. The vessel produced has a high strength metal truss structure (both above and below the water line) capable of carrying major hull loads. A number of curved or doubly curved composite (e. g. GRP) panels produced by vacuum assisted resin transfer molding are fastened by bolts, marine adhesives, and/or rivets to the below water line portions of the truss structure where necessary to handle slamming loads and to reduce water resistance and wake. Substantially flat composite pultruded panels are fastened to the truss structure both above the water line, and below the water line where the resistance to slamming loads and reduction of water resistance and wake are not critical. Necessary equipment is installed within the open truss volume before the above-water-line panels are fully installed.

A load-bearing frame structure for a maritime vehicle includes two support plates, a deck plate structure, a front bulkhead structure, and a back bulkhead structure. Each of the support plates has a front edge, a back edge, a top edge, and a bottom edge. The support plates can be angled relative to each other and connected to each other at the top edges thereof forming an inverted V-shape. The support plates can alternately be parallel to each other in a vertical orientation. The support plates each have one or more cut-out sections. The deck plate structure connects the two support plates proximate the bottom edges of the support plates. The front bulkhead structure connects the front edges of the support plates, and the back bulkhead structure connects the back edges of the support plates.

Implementations described and claimed herein provide an underwater vehicle includes a vehicle body having a frame enclosed by a fairing. The vehicle body extends between a proximal end and a distal end and defining an interior. A nose is disposed at the proximal end of the vehicle body. The nose has a tow system configured to move between a tow position and a stow position. A propulsion system is disposed at the distal end of the vehicle body. The propulsion system includes a plurality of control fins and a thruster. A power distribution system is housed in the interior of the vehicle body. The power distribution system includes a first power system housed in a first pressure vessel and a second power system housed in a second pressure vessel. The first pressure vessel is isolated from the second pressure vessel.

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 gas transport vessel having a hull and a tank longitudinally received in the hull and method of constructing the tank within the hull. The vessel is designed to transport fluids, such as hydrogen or other gases and liquids. The tank has a plurality of layers that are unconnected to adjacent layers. The tank contacts the vessel at a top and bottom. The top connection, for example a connection to deck structure, supports the tank for preventing sagging. The tank may be substantially the length of the ship and located between a forward and a rearward bulkhead. Two tanks may placed adjacent one another separated by a longitudinal bulkhead. Each layer has a forward and rearward end cap constructed of multiple frusto-conical sections. A space is provided on sides of the tank to permit expansion. The tank is integral with ship structure, thereby providing additional strength to the vessel.

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.