The term "steering apparatus" refers to any mechanism that is used to control the direction of movement of a vehicle or machine. There are several synonyms for this phrase, each of which describes a particular type of steering system. For example, one synonym might be "tiller," which is a type of handle found on boats that is used to control the angle of the rudder. Another synonym might be "hydraulic system," which uses fluid pressure to control the movement of hydraulic pistons and thus, the direction of the vehicle. Other possibilities include terms such as "joystick," "wheel," "rudder," and "control panel." Regardless of the specific type of steering apparatus used, it is an essential component of any vehicle or machine that requires directional control.