The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.<br>A:VHF communications are basically line of sight<br>B:the air is more dense the higher you go<br>C:salt water is a poor conductor of sound<br>D:sea water absorbs the radiated energy

The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.
A:VHF communications are basically line of sight
B:the air is more dense the higher you go
C:salt water is a poor conductor of sound
D:sea water absorbs the radiated energy

出自：海船船员证

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