US 12,103,654 B2
Marine vessel propulsion system, communication terminal, and keycode server
Masashi Matsuo, Shizuoka (JP); Yuki Yamaguchi, Shizuoka (JP); and Taichi Sato, Shizuoka (JP)
Assigned to YAMAHA HATSUDOKI KABUSHIKI KAISHA, Shizuoka (JP)
Filed by YAMAHA HATSUDOKI KABUSHIKI KAISHA, Iwata (JP)
Filed on Jul. 12, 2021, as Appl. No. 17/372,583.
Claims priority of application No. 2020-140328 (JP), filed on Aug. 21, 2020.
Prior Publication US 2022/0055729 A1, Feb. 24, 2022
Int. Cl. B63H 21/21 (2006.01); G05D 1/00 (2006.01)
CPC B63H 21/21 (2013.01) [G05D 1/0016 (2013.01); G05D 1/0022 (2013.01); G05D 1/0206 (2013.01); B63H 2021/216 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A marine vessel propulsion system for applying a propulsive force to a marine vessel, the marine vessel propulsion system comprising:
a propulsive force generator to generate the propulsive force;
a drive source to drive the propulsive force generator; and
a controller configured or programmed to control the drive source to perform a plurality of marine vessel maneuvering-related functions including at least one limited function; wherein
the controller includes an interface;
the controller is further configured and programmed to include a restriction unit to restrict a control operation for the at least one limited function, and a restriction cancellation unit to cancel the restriction effected by the restriction unit to permit the control operation for the at least one limited function when a predetermined keycode is inputted from the interface or is registered in the controller;
if the predetermined keycode includes valid period information, the restriction cancellation unit cancels the restriction effected by the restriction unit during a valid period indicated by the valid period information; and
the at least one limited function includes a function to cause the marine vessel to travel at a constant speed.