A maritime floatation device for using remote firing devices above and below the water line by way of non-electric or electric initiation, the maritime floatation device includes: a) a receiver housing having a combination of at least two receivers connectable via shock tube to respective explosive means, one receiver is adapted for timed initiation for separation and the second receiver adapted for remote initiation or timed initiation in order to meet the desired required operational capabilities of the maritime floatation device; b) a releasable basket housing connected to receiver housing; c) retention means for retaining two housings together; d) separation means for deactivating the retention means so as to allow for separation the receiver housing from the basket housing upon the activation of the separation means by the explosive means initiated from a timed initiated receiver; e) a shock tube spool position able within the basket housing wherein the spool accommodates and includes a length of shock tube that is connectable to the second receiver and to explosive means so as to allow flexibility in deployment of the maritime floatation device to suit the desired standard operating procedures; and/or f) floats attachable to the receiver housing so as to allow receiver housing to float to the surface once the receiver housing is separated from the basket housing; wherein the maritime floatation device allows non-electric or electric initiation of shock-tube with properties able to be deployed and operated under water at water depths without ingress of water impacting on the reliability of the maritime floatation device.

A hull for a personal watercraft includes a compression-molded hull body. A main portion of the hull body includes a thermoplastic material embedded with non-directional chopped glass fibers. The main portion extends along an entirety of the length and of the width of the hull body. Port and starboard portions of the hull body include the thermoplastic material embedded with directional glass fibers. The directional glass fibers include longitudinally-oriented glass fibers. A majority of the longitudinally-oriented glass fibers have a length at least ten times greater than a mean length of the chopped glass fibers. The port and starboard portions extend vertically from proximate an upper edge of the hull towards a keel, and longitudinally along at least 50% of the length of the hull body.

A hull for a personal watercraft includes a compression-molded hull body. A main portion of the hull body includes a thermoplastic material embedded with non-directional chopped glass fibers. The main portion extends along an entirety of the length and of the width of the hull body. Port and starboard portions of the hull body include the thermoplastic material embedded with directional glass fibers. The directional glass fibers include longitudinally-oriented glass fibers. A majority of the longitudinally-oriented glass fibers have a length at least ten times greater than a mean length of the chopped glass fibers. The port and starboard portions extend vertically from proximate an upper edge of the hull towards a keel, and longitudinally along at least 50% of the length of the hull body.

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 hull for a personal watercraft includes a compression-molded hull body. A main portion of the hull body includes a thermoplastic material embedded with non-directional chopped glass fibers. The main portion extends along an entirety of the length and of the width of the hull body. Port and starboard portions of the hull body include the thermoplastic material embedded with directional glass fibers. The directional glass fibers include longitudinally-oriented glass fibers. A majority of the longitudinally-oriented glass fibers have a length at least ten times greater than a mean length of the chopped glass fibers. The port and starboard portions extend vertically from proximate an upper edge of the hull towards a keel, and longitudinally along at least 50% of the length of the hull body.

A hull for a personal watercraft includes a compression-molded hull body. A main portion of the hull body includes a thermoplastic material embedded with non-directional chopped glass fibers. The main portion extends along an entirety of the length and of the width of the hull body. Port and starboard portions of the hull body include the thermoplastic material embedded with directional glass fibers. The directional glass fibers include longitudinally-oriented glass fibers. A majority of the longitudinally-oriented glass fibers have a length at least ten times greater than a mean length of the chopped glass fibers. The port and starboard portions extend vertically from proximate an upper edge of the hull towards a keel, and longitudinally along at least 50% of the length of the hull body.

A marine deck member with enhanced surface traction and the process for forming the same. The marine deck member comprises a sandwich-type composite panel made by a compression molding process. In such a process, the panel is made by subjecting a heated stack of layers of material to cold-pressing in a mold. The cellular core has a 2-D array of cells, each of the cells having an axis substantially perpendicular to the outer surfaces, and extending in the space between the layers or skins, with end faces open to the respective layers or skins. The surface traction of this type of composite panel can be enhanced for marine deck applications by controlled debossing, or embossing, of the first skin while it cools in the compression mold. The debossing effect can be effected by applying pressurized gas, e.g., pressurized air, onto the outer surface of the first skin while in the compression mold. The embossing can be effected by applying vacuum pressure on the outer surface of the first skin while in the compression mold.

A method of manufacturing a boat hull comprising: forming a foam mold of a predetermined shape and size from one or more pieces of foam; cutting, into said foam, at least one-channel running in a longitudinal or a lateral direction within the foam; and coating said foam with at least one layer of reinforcing fiber and resin.

A method of manufacturing a boat hull comprising: forming a foam mold of a predetermined shape and size from one or more pieces of foam; cutting, into said foam, at least one-channel running in a longitudinal or a lateral direction within the foam; and coating said foam with at least one layer of reinforcing fiber and resin.

A method of manufacturing a boat hull comprising: forming a foam mold of a predetermined shape and size from one or more pieces of foam; cutting at least one C-channel into said foam running in a longitudinal or a lateral direction within the foam; and coating said foam with at least one layer of reinforcing fiber and resin.