The steering wheel, ships wheel, or simply wheel is the device that is used to impart the force on the rudder to make the vessel turn. The steering wheel has evolved from the tiller, and at its first inception, actually worked as the tiller did. (i.e., turning the wheel to the left or port caused the vessel to go right or to starboard - known as tiller steering). The steering wheel is connected to the steering gear and rudder via mechanical linkage or hydraulic system, and is most often power assisted to make turning the vessel easier. More modern vessels often have a steering wheel that is more for looks or to be used as an emergency steering input, the vessels rudder being controlled by a jogstick or joystick.