Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.
Free testeasyHF-communications
The main disadvantage of HF communication is:
A
Limited to line of sight
B
Requires large aircraft antennas
C
Subject to atmospheric noise, fading, and variable propagation conditions
D
Only works during daylight
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See where you stand: 5 hard questions, instant score, every answer explained.