Methods of forming a boat hull include applying an outer polymer layer onto a hull mold, the outer polymer layer being impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage. An inner polymer layer is applied onto the outer polymer layer, the inner polymer layer being impregnated with a biologically active chemical substance that inhibits biofouling-induced chemical, biological, and bio-proliferative damage. One or more layers of fiberglass matting are applied on the inner polymer layer, the fiberglass matting being saturated with a polymer selected from one of a group of polymers comprising a vinyl ester polymer, a phthalic unsaturated polyester polymer, and an epoxy polymer.

Disclosed is a system comprising: a first, underwater, vessel provided with a substantially flat lower surface; and a second, surface, vessel, comprising a floodable well deck arranged to receive and accommodate the first vessel.

A stringer for having a runout with a raised area configured to reduces stress while improving drainage across the runout when utilized in a close structural component of a vehicle such as an aileron of an aircraft. In one or more configurations, the raised area of the runout of the stringer includes multiple tapered surfaces adjacent to one another oriented and configured as ramps to collectively guide water up, over and down the raised area of the stringer.

A stringer for having a runout with a raised area configured to reduces stress while improving drainage across the runout when utilized in a close structural component of a vehicle such as an aileron of an aircraft. In one or more configurations, the raised area of the runout of the stringer includes multiple tapered surfaces adjacent to one another oriented and configured as ramps to collectively guide water up, over and down the raised area of the stringer.

A fishing kayak is described comprising a body having a bow end and a stern end the body comprising a deck and a hull. The deck defines a top side of the body of the fishing kayak and the hull defines a bottom side of the body of the fishing kayak. The hull comprises a pontoon hull portion extending from the stern end of the body along a longitudinal axis of the body, the pontoon hull portion being comprised of two pontoon members positioned in an opposing relationship, the pontoon hull portion defining a concave recess to form a tunnel structure. The hull also comprises a convex hull portion extending from the bow end of the body along the longitudinal axis, the convex hull portion being comprised of a convex hull member. The two pontoon members converge into the convex hull portion to form at least in part the convex hull member.

A stringer for having a runout with a raised area configured to reduces stress while improving drainage across the runout when utilized in a close structural component of a vehicle such as an aileron of an aircraft. In one or more configurations, the raised area of the runout of the stringer includes multiple tapered surfaces adjacent to one another oriented and configured as ramps to collectively guide water up, over and down the raised area of the stringer.

A stringer for having a runout with a raised area configured to reduces stress while improving drainage across the runout when utilized in a close structural component of a vehicle such as an aileron of an aircraft. In one or more configurations, the raised area of the runout of the stringer includes multiple tapered surfaces adjacent to one another oriented and configured as ramps to collectively guide water up, over and down the raised area of the stringer.

A fishing kayak is described comprising a body having a bow end and a stern end the body comprising a deck and a hull. The deck defines a top side of the body of the fishing kayak and the hull defines a bottom side of the body of the fishing kayak. The hull comprises a pontoon hull portion extending from the stern end of the body along a longitudinal axis of the body, the pontoon hull portion being comprised of two pontoon members positioned in an opposing relationship, the pontoon hull portion defining a concave recess to form a tunnel structure. The hull also comprises a convex hull portion extending from the bow end of the body along the longitudinal axis, the convex hull portion being comprised of a convex hull member. The two pontoon members converge into the convex hull portion to form at least in part the convex hull member.

A fishing kayak is described comprising a body having a bow end and a stern end the body comprising a deck and a hull. The deck defines a top side of the body of the fishing kayak and the hull defines a bottom side of the body of the fishing kayak. The hull comprises a pontoon hull portion extending from the stern end of the body along a longitudinal axis of the body, the pontoon hull portion being comprised of two pontoon members positioned in an opposing relationship, the pontoon hull portion defining a concave recess to form a tunnel structure. The hull also comprises a convex hull portion extending from the bow end of the body along the longitudinal axis, the convex hull portion being comprised of a convex hull member. The two pontoon members converge into the convex hull portion to form at least in part the convex hull member.

In one embodiment of the invention, a boat is provided which includes a deck; a plurality of pontoons extending in a direction parallel to a longitudinal axis of the deck, the deck being attached to the pontoons; and a hull portion attached to and extending from one of the pontoons. The hull portion extends outwardly to a distance wider than the pontoon to which it is attached, and the hull portion extends farther rearwardly than any of the pontoons.