| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a navigation device for a vessel properly controlling a slip ratio of marine gears and facilitating slight speed movement of the vessel. <P>SOLUTION: An instruction value conversion part 31 of an operation target operation part 30 converts an instruction signal from a joystick 25. A target propeller revolution number operation part 32 calculates the target numbers of revolution of left and right propellers 13 and a propeller 14b of a thruster 14 using the respective converted values in order to accomplish the movement form of the vessel intended by a vessel operator. In a main engine operation control part 40, a slip ratio determination part 41 calculates a slip ratio U of a clutch mechanism 120 of the marine gear 12 in order to rotate the propeller 13 at the target number of revolution. A drive control part 42 controls operation of the main engine 11 and the clutch mechanism 120. Further, in the thruster operation control part 50, a drive control part 52 drives/controls the propeller 14b in a rotation direction determined by the operation determination part 51. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
