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116 General Information
Transmitting Distance
Several conditions determine the distance that your radio will transmit a
clear data/voice communication. The following list describes many conditions and
their typical affect on your radio's transmitting distance.
radio's power more power longer distance
radio's frequency lower frequency (VHF compared to UHF) longer distance
radio's tuning properly tuned radio (on frequency, more power) longer distance
stormy weather adverse atmospheric conditions shorter distance
at sea better ground plane (clearer line-of-sight) longer distance
city large/tall buildings (interference problems) shorter distance
in a building structural boundaries (interference problems) shorter distance
on a tall building's roof less interference (clearer line-of-sight) longer distance
in a subway below ground level (interference problems) shorter distance
on top of a hill less interference (clear line-of-sight) longer distance
intervening hills more interference (no line-of-sight) shorter distance
inside a vehicle metal structure (interference problems) shorter distance
Condition Description Effect
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