3 ms·

yes

• jschwartzi 10y ago
  All the civilian aircraft I've seen have at most two channels. There's a primary frequency which you listen on while you're flying, and you can also keep a second frequency on standby in case you need to communicate with different authorities simultaneously as you follow your route. You have to switch between frequencies in order to listen and communicate, and there's a toggle that allows you to do this. If you're not tuned to the correct frequency for the airspace you're in, then you're not going to hear any commands from the controllers for your airspace. It's entirely possible that it was an international flight with a radio not tuned for the correct frequency for the airspace. What kind of airplanes have you seen with radios that can listen on several frequencies at the same time? Are they large commercial craft?
  • akiselev 10y ago
    > What kind of airplanes have you seen with radios that can listen on several frequencies at the same time? Are they large commercial craft? Some early Junkers maybe?