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 rigid ballistic-resistant composite includes large denier per filament (dpf) yarns. The yarns are held in place by a resin to form a rigid composite panel with improved ballistic performance. The large dpf yarns may be selected from aromatic heterocyclic co-polyamide fibers, polyester-polyarylate fibers, high modulus polypropylene (HMPP) fibers, ultra high molecular weight polyethylene (UHMWPE) fibers, poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibers, poly-diimidazo pyridinylene (dihydroxy) phenylene (PIPD) fibers, carbon fibers, and polyolefin fibers.

An ultra-fast trimaran deep water and littoral naval ship suited to combat, search and rescue, and/or deployment operations has a plurality of semi-planing hulls connected to the underside of a deck in a trimaran configuration. Further, a plurality of propulsion stages including a cruise propulsion stage, a wind assisted propulsion stage, and a vectored direct thrust propulsion stage may be independently operated alone or in conjunction to propel the ship at various speeds suited to different situations.

An ultra-fast trimaran deep water and littoral naval ship suited to combat, search and rescue, and/or deployment operations has a plurality of semi-planing hulls connected to the underside of a deck in a trimaran configuration. Further, a plurality of propulsion stages including a cruise propulsion stage, a wind assisted propulsion stage, and a vectored direct thrust propulsion stage may be independently operated alone or in conjunction to propel the ship at various speeds suited to different situations.

An ultra-fast trimaran deep water and littoral naval ship suited to combat, search and rescue, and/or deployment operations has a plurality of semi-planing hulls connected to the underside of a deck in a trimaran configuration. Further, a plurality of propulsion stages including a cruise propulsion stage, a wind assisted propulsion stage, and a vectored direct thrust propulsion stage may be independently operated alone or in conjunction to propel the ship at various speeds suited to different situations.

An ultra-fast trimaran deep water and littoral naval ship suited to combat, search and rescue, and/or deployment operations has a plurality of semi-planing hulls connected to the underside of a deck in a trimaran configuration. Further, a plurality of propulsion stages including a cruise propulsion stage, a wind assisted propulsion stage, and a vectored direct thrust propulsion stage may be independently operated alone or in conjunction to propel the ship at various speeds suited to different situations.

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 security device comprising: a barrier, and a plate, wherein the barrier and the plate are releasably attachable to each other, and when the barrier and plate are attached the device comprises a slot for receiving a rail and the device may hang on a rail with the rail received in the slot, and the barrier protrudes in a horizontal direction, perpendicular from a plane extending downwardly from the rail, to provide an overhang; and wherein at least a portion of the plate is made from a bullet-resistant material.

A rigid ballistic-resistant composite includes large denier per filament (dpf) yarns. The yarns are held in place by a resin to form a rigid composite panel with improved ballistic performance. The large dpf yarns may be selected from aromatic heterocyclic co-polyamide fibers, polyester-polyarylate fibers, high modulus polypropylene (HMPP) fibers, ultra high molecular weight polyethylene (UHMWPE) fibers, poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibers, poly-diimidazo pyridinylene (dihydroxy) phenylene (PIPD) fibers, carbon fibers, and polyolefin fibers.

The present disclosure relates to a shock absorbing arrangement suitable e.g. for ship installed structures comprising a rod, a resilient member arranged in connection to the rod, a structure element and a locking member arranged in connection to the structure element. The locking member is arranged to detachably lock the structure element at a resting position at the rod and the locking member, or the structure element, is supported by the resilient member. The resilient member is configured such that a spring force of the resilient member acts to maintain the structure element essentially at the resting position at the rod. The locking member is further configured to release the structure element from the resting position when being exposed to a force exceeding a predetermined holding force, whereupon the resilient member acts to reinstate the locking of the structure element at the resting position at the rod. The present disclosure further relates to a shock absorbing structure comprising such shock absorbing arrangements.