A boat pontoon has a V-shaped keel region and a frame on deck connected to points along the keel region by rods of adjustable effective length. Any limited part of the keel region can be deflected in one direction by increasing the length of the rod connecting the frame to that part of the keel region and in the opposite direction by reducing the length of that rod.

A diving device is provided herein. The diving device includes a sealed main body and an actuator. The sealed main body has a flexible portion disposed on one part of the sealed main body. The flexible portion is controlled by the actuator to change the volume of the diving device. Therefore, a force is generated to drive the diving device moving upward or downward.

A hand covering for controlling the stroking power of hand is provided. The hand covering includes a tubular shaped body-cover for bringing the hand in a covered state. The hand covering includes one or more insert members disposed within the body-cover of the hand covering. The insert members extend the body-cover beyond the fingers. Further, one or more slits are provided on the body-cover for bringing the hand in an exposed state from the covered state. The exposed state allows the hand cover...

A display device of a personal watercraft is disclosed. The display device typically includes a memory configured to store a plurality of control modes for controlling components of the watercraft, a controller configured to control the components of the watercraft based on a control mode selected from the control modes, and a display portion that is provided in a display panel positioned in the vicinity of a steering handle of the watercraft and is configured to display operating information of...

A life preserver comprising a buoyant toroidal body having spaced yieldable strap members disposed within the body and accessible through the central opening of the body, a length of strap extending around the inner periphery of the toroidal body and operably connected with the yieldable strap members whereby the strap is maintained in a normal storage position substantially adjacent the inner periphery of the toroidal body, the strap having the opposite ends thereof extending radially outwardly...

In a suction dredger or the like, intended for use in ice-filled waters, there is an overflow tube with a stationary lower portion and a vertically movable upper portion. At the lower end of the stationary tube portion, there is a closure member partly covering the end opening of the tube. Also at the lower end of the movable tube portion, there is a closure member, which substantially covers that portion of the lower end opening of the movable tube portion, which corresponds to the portion of t...

A sailing ship (1) has at least one mast (2,3,4) rigidly attached thereto, to which the yards (5 to 9) are rotatably attached. By an actuating shaft (21), the sail (22, 22a, 22b) can be reefed and, with the aid of a corresponding rope (24), it can be erected or stretched. The sail (22, 22a, 22b) is narrower in the middle than at the edges and has upper and lower boltropes (48, 49) that are guided in grooves (27) to the yards (5-9). Erecting and reefing of the sail (22, 22a, 22b) and bracing can ...

Two embodiments of hydraulic control systems for outboard drives that permit the motor to pop up when an underwater obstacle is struck and return to its normal condition once the obstacle is cleared under a controlled force. Each embodiment includes a simplified arrangement wherein the motor may be raised from a normal running condition to a shallow water trim position and will be held hydraulically in the shallow water position. Each embodiment also permits popping up of the motor from the shal...

The present invention relates to a connecting device between the wishbone 7 and the mast 2 of a sailboard, characterized in that it comprises a substantially V-shaped element 8 pivoted on each of both arms of the wishbone 7 and intended to surround the mast 2 when hoisting home the clew 6 of the sail 4 on the said wishbone 7.

A replaceable marine fender mechanism according to the present invention is adapted for connection to marine structures such as the cylindrical legs of offshore platforms to prevent vessels and other objects from impacting against the platform legs and causing damage. The fender mechanism is supported by upper and lower energy cells with the lower energy cell having a stabbing and positioning receptacle that is adapted to receive a stabbing and positioning portion defined at the lower extremity ...