Final answer:
Navigation receivers such as VOR, DME, and ILS are tuned using on-board systems within the aircraft, not by air traffic controllers, using resonance principles similar to satellite dish receivers.
Step-by-step explanation:
Normally, the VOR, DME, and ILS receivers are tuned using the frequency selector knobs on each receiver, by entering the frequency into each receiver using the control panel, or they can be programmed to tune automatically by the aircraft's avionics system. However, the receivers are not tuned by the air traffic controller. The tuning process allows these systems to resonate at specific frequencies required to receive navigation and landing information.
Similar to how satellite dishes receive TV signals by being tuned to resonate at their frequencies, navigation receivers in aircraft operate on the same principle of resonance to pick up VOR, DME, and ILS signals.
An understanding of the resonance principle helps to comprehend how these receivers can selectively pick and amplify the correct signals, ensuring accurate navigation and communication between the aircraft and ground services.