Abstract: A double level flight deck type aircraft carrier is disclosed to include a second level of flight deck so that aircraft launching and landing operations can be separately performed on the decks. The double deck design doubles the operation capacity and capability.

Abstract: A rowing boat footrest assembly is provided with a stationary boat mounting, a shoe support and a lateral adjustment mechanism. The stationary boat mounting structure is arranged to be coupled to a rowing boat, the stationary boat mounting structure. The first shoe support unit stationary boat mounting structure is arranged to be coupled to a rowing boat. The shoe support includes an attachment member adjustably coupled to the stationary boat mounting structure, and a footrest member attached to the attachment member. The lateral adjustment mechanism is disposed between the stationary boat mounting structure and the shoe support to slidably mount the shoe support on the stationary boat mounting structure. The lateral adjustment mechanism is arranged to selectively secure the shoe support in at least two different lateral foot positions with respect to the stationary boat mounting structure.

Abstract: A marine propulsion system includes a power source, a propeller, a shift mechanism, a control lever, a rotational speed sensor, and a control device. The shift mechanism is switchable among three shift positions including forward, neutral, and reverse. The control lever is operable by the marine vessel operator to switch the shift position of the shift mechanism. The rotational speed sensor detects the rotational speed of the propeller. The control device controls at least one of the power source and the shift mechanism so as to reduce the rotational speed of the propeller if the rotational speed sensor detects a rotational speed of the propeller when the control lever is in a position corresponding to the neutral shift position. As a result, the propeller is prevented from rotating when a control lever is in a neutral position.

Abstract: A boat propulsion system that easily and finely adjusts the rotational speed of a propeller includes an outboard motor including an engine, a propeller, a shift mechanism, and a control device. The control device controls engaging states of clutches so that the rotational speed of a second power transmission shaft is substantially the same as the rotational speed of a third power transmission shaft in a first mode in which the shift position is a forward or a reverse position. The control device controls the engaging states of the clutches so that the rotational speed of the third power transmission shaft is lower than the rotational speed of the second power transmission shaft in a second mode in which the shift position is the forward or the reverse position.

Abstract: A boat includes a steering load detector arranged to calculate an output value of a steering motor necessary for steering an outboard motor in a traveling state, a motor output detector arranged to detect a possible output value that can be output by the steering motor, a prediction determination unit arranged to compare the necessary output value from the steering load detector with the possible output value from the motor output detector, and an electric power load control unit arranged to perform a control operation so as to increase a battery charge amount and/or to reduce the electric power load when the necessary output value is determined to be larger than the possible output value. As a result, the boat that can effectively perform steering when a motor output becomes small as a result of a reduced battery charge amount.

Abstract: Disclosed is an articulating sail feeder that solves problems associated with furling and reefing sails on yachts, particularly large yachts. The inventive sail feeder includes hinge tracks arranged in articulating column that bends and rotates freely, but limits the axial twist of the sail as during furling and reefing. The inventive hinge tracks have a cross section that includes a batten end receptacle with channels for headboard cars. Hinge tracks with the inventive cross section absorb the wind-generated compressive forces exerted by the battens on the batten pockets, reducing chafing, and eliminate the need for sail slides, which would otherwise lock the sail in place during furling and reefing.

Abstract: An inflatable device that floats on water has an inflatable body that has a hollow interior, a speaker unit removably secured to the body, a battery box removably secured to the body, and wiring that electrically connects the speaker unit with the battery box. The wiring is housed inside a tube that extends inside the hollow interior of the body and exits the body at least one exit location, the wiring including a first electrical connector that is removably coupled to the speaker unit, and a second electrical connector that is removably coupled to the battery box.

Abstract: An apparatus for use in the activity of freediving, providing the freediver with increased safety and protection in the event of Shallow Water Blackout, incapacitating hypoxia, or other emergency occurring in or under the water, while providing greater reliability of functioning, and comfort of wearing during the activity of freediving.

Abstract: A vest personal flotation device saver includes: (a) a saver pillow portion, and two substantially mirror image saver tail portions extending from the pillow portion, with at least four substantially parallel body strap slots; (b) a central open neck; (c) an open-ended gap extending down from the open neck between the two tail portions; (d) three closable, adjacent body sides; (e) a central main chamber; and (f) a releasable closure mechanism attached to each of the body sides; wherein the personal flotation device saver has an open position and a closed position. The vest-type personal flotation device saver may include a closed tail end pocket at the end of each tail portion, a releasable saver waist strap device attached to the tail portion; and a locking mechanism adjacent the closure mechanism. This simplified abstract is not intended to limit, and should not be interpreted as limiting, the scope of the claims.

Abstract: Compound hull for electric-powered, cruiser-type vessels having a unique hard chine displacement wave form hull that recycles wave energy to minimize drag and results in lowered power requirements for long-period cruising at displacement hull speeds. The inventive hull comprises: 1) an upper hull portion having a flat bottom square transom, the bottom curve of the hull sides of which match the vessel's wave form at hull speed, mated to, 2) a bottom hull portion formed as a double ended V-bottom lower displacement hull having a constant varying dead-rise. The inventive hull requires up to 50% less power than conventional cruisers of other hull shapes, at displacement hull speed.

Abstract: A steering device of a personal watercraft is disclosed. The steering device typically includes a lower steering column that is mounted to a body of the watercraft and is configured to be rotatable around a rotational axis extending rearward and upward, and an upper steering column that is configured to support a steering handle and is movably coupled to the lower steering column. The upper steering column is movable close to and away from the lower steering column along a straight line extending to be inclined rearward with respect to the rotational axis of the lower steering column.