Final answer:
The HDG/TRK selector knob is a control feature commonly found in aircraft navigation systems. It allows pilots to select and adjust the heading or track of the aircraft.
Step-by-step explanation:
Features of the HDG/TRK selector knob
The HDG/TRK selector knob is a control feature commonly found in aircraft navigation systems. Its purpose is to allow pilots to select and adjust the heading or track of the aircraft. The knob is typically located on the control panel and can be rotated to input the desired direction.
For example, in an autopilot system, the pilot can use the HDG/TRK selector knob to set the desired heading for the aircraft to follow. This allows the autopilot to automatically steer the aircraft in the selected direction.
Some advanced aircraft navigation systems may also have additional features integrated into the HDG/TRK selector knob, such as the ability to synchronize with other navigation instruments or to control the aircraft's lateral modes.