Abstract: An improved ship which incorporates a distortion sensor arrangement. Measurement data supplied by the distortion sensor arrangement is preferably used to correct measurement data supplied by and/or control signals for an on-board directional apparatus. The distortion sensor arrangement preferably includes a hull-mounted laser beam/light sensor combination, and such that the light sensor continuously measures a deflection of the laser beam in response to a distortion of the ship.

Abstract: A bracket is provided for use with a marine cleat which may be attached to a boat. The bracket is in the form of a rod having first and second ends. The first end of the rod is bent into a Z shape or S shape configuration for engagement with the marine cleat so that the rod is secured to the cleat. The second end is adapted to receive an accessory, such as a lantern.

Abstract: An apparatus for separating mating cylindrical members, for example mating sections of a sailboard mast. The apparatus includes either a pair of support elements or a block element and a lever arm. Each of the pair of support elements and the block element is configured to receive one of the mating sections of the sailboard mast and the lever arm is configured to receive the other of the mating sections of the sailboard mast. Connecting elements are provided for frictionally holding one of the mating sections of the sailboard mast to either the support elements or the block element and for frictionally holding the other of the mating sections of the sailboard mast to the lever arm. In operation, the lever arm is moved so as to apply a torsional force to the other of the mating section of the sailboard mast while the one of the mating sections of the sailboard mast is held in position either in the pair of support elements or in the block clement.

Abstract: An underwater testing platform assembly includes first and second rails for disposition in part in a body of water, each of the rails having facility for connection to a surface vessel. The rails are disposed vertically, parallel to each other. A cage comprising a network of struts is mounted on the rails. A skid is mounted on, and is movable in, the cage, and can receive and retain an apparatus to be tested. First and second travelers are fixed to the cage and are movably mounted, respectively, on the rails, such that the cage is vertically movable on the rails. Instrumentation is mounted on the cage. A transmission line is connected at a first end to the instrumentation and extends to the surface vessel. A receiver on the surface vessel has a second end of the transmission line connected thereto and receives data signals from the instrumentation.