US 12,077,272 B2
System for and method of controlling watercraft including marine propulsion device
Yuji Ikegaya, Shizuoka (JP)
Assigned to YAMAHA HATSUDOKI KABUSHIKI KAISHA, Shizuoka (JP)
Filed by YAMAHA HATSUDOKI KABUSHIKI KAISHA, Iwata (JP)
Filed on Nov. 4, 2021, as Appl. No. 17/518,673.
Claims priority of application No. 2020-197453 (JP), filed on Nov. 27, 2020.
Prior Publication US 2022/0169352 A1, Jun. 2, 2022
Int. Cl. B63H 20/12 (2006.01); B63H 25/38 (2006.01)
CPC B63H 20/12 (2013.01) [B63H 25/38 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A system for controlling a watercraft, the system comprising:
a marine propulsion device rotatable about a steering shaft;
a joystick operable by tilting and twisting to output an operating signal indicating a tilt amount and a twist direction of the joystick; and
a controller configured or programmed to:
receive the operating signal;
control the marine propulsion device to output a thrust having a magnitude depending on the tilt amount;
change a rudder angle of the marine propulsion device such that the watercraft turns in a direction corresponding to the twist direction; and
reduce a speed of changing the rudder angle with an increase in the magnitude of the thrust.