Abstract: A boat can be provided with an electrically controlled outboard motor, or other type of propulsion unit, for producing thrust according to an operation of a remote control unit provided in a hull of the boat. The remote control ECU which can output a remote control operation signal can be provided in the remote control unit. An engine ECU which can receive the remote control operation signal and control the outboard motor, can be provided in the outboard motor. The remote control unit and the outboard motor can have respective connectors directly connected to each other via a DBW CAN cable.

Abstract: A music box comprising a blower unit and a flute unit. Each flute in the flute unit includes a mouth and a wind inlet hole for feeding air to the mouth and the wind inlet holes for feeding air to the flute are selectively opened/closed to produce a desired melody. Further, an air outflow hole is provided in a wind trunk of the blower unit and a disk having holes for cyclically opening/closing the hole is rotatably provided. Thus the pressure of wind fed to each flute changes at a predetermined interval of time. As a member for recording a melody, the following two methods are available. One method is a disk having protrusions for pressing the key members of the flute unit and another method is a film member which opens/closes the air inlet hole of the flute unit.