Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.
Free testmediumradio-propagation
HF radio waves can propagate over long distances because they are:
A
Very powerful
B
Guided along the Earth's surface
C
Reflected by the ionosphere (sky wave propagation)
D
Transmitted by satellites
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See where you stand: 5 hard questions, instant score, every answer explained.