Final answer:
Independent DME tuning is an aviation procedure for calibrating Distance Measuring Equipment to ensure accurate distance measurements for navigational and landing purposes and is performed using specialized avionics equipment.
Step-by-step explanation:
Independent DME tuning refers to the process of calibrating a Distance Measuring Equipment (DME), which is a system used in aviation to measure the slant range distance of an aircraft from a navigational beacon. This calibration can be carried out via specific avionics equipment that allows the adjustment and tuning of the DME system independently from other navigational aids. To ensure accurate distance measurements, which are crucial for navigation and landing procedures, technicians may perform this tuning process using specialized test equipment that simulates the signals the DME would receive during flight conditions.