Abstract: An extendible mooring hook has a pair of jaw members spring biased to an open position with a shuttle removably retained on one jaw member. A detent mechanism engages the shuttle member when the jaw members close around a mooring post and pulls the shuttle, and attached mooring line, around the mooring post when the jaw members return to their open position. The pole portion can be extended, and a incorporates a traveler mechanism to compensate for changes in cable length so that cable tension is maintained when the pole is extended.

Abstract: A device to observe the sea bed from the deck of a vessel is formed by a cubicle that has attachment points to attach it to the structure of the stern of the vessel. This cubicle has a vertical wall that forms a sealed block on the bottom wall of which are the lighting points to illuminate the sea bed. The base of the rest of the cubicle has a resistant transparent glass in contact with the water, since the lights and this glass are on the same plane and below the water line of the vessel. The device has an inclined mirror in the upper part and forms a prolongation of the inclined surface of the block, in which mirror is reflected the sea bed which is seen through the glass and at the same time may be observed from any part of the deck of the vessel.

Abstract: In an improved sail for a sailboat, the trailing edges of a pair of flaps of a conventional sail material are attached to the trailing edge of the sail, one on each side; the leading edges of the flaps are not fixed to the sail, but are connected to one another by short sections of line extending through holes in the sail. When the boat is tacked from one tack to the other, the leading edge of the flap on the new windward side is pulled away from the surface of the sail by the wind, so that a flow-impeding lip is provided on the windward side of the leech. At the same time, the lines pull the leeward flap against the main body of the sail, so that drag is not increased substantially. Substantial improvements in sailing performance are realized, while no control action is required to cause the flaps thus to be reconfigured upon tacking, and so that ordinary sailing manuevers and all normal sail handling operations may be carried out without complication.

Abstract: An oil reservoir is used as a sound attenuator in an outboard motor and is placed under the cowl of the outboard motor with the throats of the engine's throttle bodies disposed between the oil reservoir and the engine itself. This allows the sound emanating from the throttle bodies to be attenuated by the oil reservoir which is cup-shaped to partially surround the throat of the throttle bodies. A plate member can be attached to a hollow wall structure in order to enclose a cavity therebetween. The structure therefore serves as an oil reservoir for the engine and also as a sound attenuating member.