A system for guiding a first watercraft remotely has a rudder proximate the stern of the first watercraft, having a rudder shaft extending upward from a deck area at the stern, a servo device having an output servo horn coupled to the rudder shaft by a linkage, adapted to turn the rudder shaft in concert with the servo horn, a radio receiver/controller adapted for receiving radio signals for guiding the first watercraft, the radio receiver/controller coupled to the servo device, and a radio transmitter having an input wheel for providing steering commands. The system is characterized in that the input wheel of the radio transmitter is manipulated by a user remote from the watercraft, the radio signals for guiding the first watercraft are transmitted from the radio transmitter to the radio receiver/controller on the first watercraft, and the radio receiver/controller provides operating signals to the servo device to rotate the servo horn either clockwise or counterclockwise, guiding the first watercraft.

A system for guiding a first watercraft remotely has a rudder proximate the stern of the first watercraft, having a rudder shaft extending upward from a deck area at the stern, a servo device having an output servo horn coupled to the rudder shaft by a linkage, adapted to turn the rudder shaft in concert with the servo horn, a radio receiver/controller adapted for receiving radio signals for guiding the first watercraft, the radio receiver/controller coupled to the servo device, and a radio transmitter having an input wheel for providing steering commands. The system is characterized in that the input wheel of the radio transmitter is manipulated by a user remote from the watercraft, the radio signals for guiding the first watercraft are transmitted from the radio transmitter to the radio receiver/controller on the first watercraft, and the radio receiver/controller provides operating signals to the servo device to rotate the servo horn either clockwise or counterclockwise, guiding the first watercraft.

Embodiments of the present disclosure provide a biomimetic underwater vehicle which is mainly used in water, comprising a head portion and a body portion, wherein the head portion comprises a first housing, a motor portion is provided in the first housing, the motor portion comprises a plurality of motor assemblies; the body portion comprises a second housing, and a plurality of rotation joints corresponding to the plurality of motor assemblies are provided in the second housing; the plurality of rotation joints are sequentially connected along the length direction of the biomimetic underwater vehicle, and the rotation joint at the most downstream is connected to a tail portion, and each of the motor assemblies is connected to the corresponding rotation joint via two pull ropes and drives the rotation joint to move, and the two pull ropes are located on two sides of the body portion respectively. According to the embodiments of the present disclosure, by the corresponding arrangements of the motors located at the head portion and the rotation joints located in the middle and the transmission manner of multiple joints, on the one hand, the inertia of movement of the tail portion of the biomimetic underwater vehicle is reduced, and on the other hand, the center of gravity of the whole is moved forward so as to reduce the swinging movement of the head portion during driving of the biomimetic underwater vehicle, thereby achieving a flexible biomimetic effect and improving the propulsive performance of the biomimetic underwater vehicle.

A trimmable rudder system for a marine vessel such as a planing power boat, the system including a pair of rudder assemblies, each of which includes a rudder blade movably coupled to the hull by way of a ball-and-socket joint. Each rudder assembly includes a rudder shaft that extends from the rudder blade through the ball-and-socket joint and can be rotated for rotating the rudder blade to steer the power boat. Each rudder shaft may be operably coupled to a pair of actuators configured to control trim and camber positions of the rudder blade so that the pair of rudder blades can collectively achieve a desired hull trim change, including listing control and planing control of the power boat. Steering position, trim position, and camber position of the rudder blades may be simultaneously changed.

An embodiment of a system for controlling a marine vessel includes an electrical power steering unit coupled to a mechanical control system, the mechanical control system including a steering wheel connected by a shaft to a mechanical cable assembly, the mechanical cable assembly configured to be actuated by the steering wheel to control a steering mechanism of the marine vessel. The electrical power steering unit includes an electric motor configured to apply a torque to the mechanical cable assembly. The system also includes a processor configured to control the electrical power steering unit to provide at least one of steering assist and control of the marine vessel.

An embodiment of a system for controlling a marine vessel includes an electrical power steering unit coupled to a mechanical control system, the mechanical control system including a steering wheel connected by a shaft to a mechanical cable assembly, the mechanical cable assembly configured to be actuated by the steering wheel to control a steering mechanism of the marine vessel. The electrical power steering unit includes an electric motor configured to apply a torque to the mechanical cable assembly. The system also includes a processor configured to control the electrical power steering unit to provide at least one of steering assist and control of the marine vessel.

An embodiment of a system for controlling a marine vessel includes an electrical power steering unit coupled to a mechanical control system, the mechanical control system including a steering wheel connected by a shaft to a mechanical cable assembly, the mechanical cable assembly configured to be actuated by the steering wheel to control a steering mechanism of the marine vessel. The electrical power steering unit includes an electric motor configured to apply a torque to the mechanical cable assembly. The system also includes a processor configured to control the electrical power steering unit to provide at least one of steering assist and control of the marine vessel.