Patent ID: 11904988
Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 9:
10. A watercraft comprising:
a hull;
a prime motor to generate power to propel the hull;
an ON/OFF sensor to be turned on and off such that the ON/OFF sensor is switched from one of ON and OFF states to the other of the ON and OFF states according to a vertical acceleration of the hull; and
a controller configured or programmed to determine, based on a detection value of the ON/OFF sensor, whether or not a water surface is smooth; wherein
the controller is configured or programmed to determine whether a speed of the watercraft is not lower than a lower limit speed and, if it is determined that the watercraft speed is lower than the lower limit speed, determine that the water surface is smooth.