Abstract: The invention is a monohull water-borne craft comprising a hull having a main portion and an opposed pair of stabilizers, the stabilizers being positioned on opposite sides of the main hull portion and being disposed closely adjacent to the main hull portion. The stabilizers may be elongate and arranged with their long axes extending along the main hull portion to form pods. The stabilizers may be integral with the main hull portion or may be movable, e.g. to enable variable geometry to give active buoyancy and/or ballast and/or assistance in steering or stability. The stabilizers may carry propulsion means, fuel tanks, active ballast tanks or the like. The stabilizers may thus be single function e.g. to provide buoyancy, ballast or to house equipment such as propulsion means or may be multifunctional to combine one or more of such functions. The craft may be a power boat or a sail craft and may be convertible between power and sail.

Abstract: In a sail boat having a hull, an upstanding mast in the hull, a boom articulated on the mast, a sail supported on the mast and controlled by the boom, a crew cockpit disposed below the boom, the cockpit having a front, sides and a rear, and a hoop-like structure straddling the cockpit transversely of the boat in the vicinity of and below the boom to define a safe area within the cockpit into which the boom is positively prevented from encroaching; screen structure is provided which has a front portion arranged to shield the cockpit front and side portions which shield the cockpit sides. A track along which the screen structure is slidable longitudinally of the boat is included. The screen structure is arranged such that in its rearward position the side portions of the screen structure seal against the hoop-like structure.