Questions tagged [frequency]
Questions about the different radio frequencies used for aircraft communications and navigation and the processes of selecting them.
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Why do so many airports have the same CTAF frequency?
In the United States, many non-towered airports have CTAF frequencies (often shared with UNICOM as well) that tend to overlap with various other airports within a 50-100 nm radius, at least in more ...
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Why is the VOR reference and variable signal modulated at 30 Hz?
VOR signals radiated from the ground beacon are modulated at 30 Hertz.
What is the reason behind this?
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What does "Except" mean in this ATC request?
I guess ATC wants the pilot to leave FL 280 for heavy traffic approaching from behind. But since I'm not sure, I wanted to ask. Also in the second quote from pilot, except should be expect, right?
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