Which statement about UHF range is true?

• A. It is not line of sight.
• B. It is line of sight and depends on altitude and power.
• C. It can reach beyond line of sight via reflections.
• D. It does not depend on power.

Answer: (B)

UHF signals behave essentially as line-of-sight communications. The Earth's curvature means you can only see a straight path between the transmitting and receiving antennas within a certain distance, which grows as you lift either antenna higher. Power matters because stronger transmit power (and higher antenna gain) improves the received signal quality at the edge of that line-of-sight, extending usable range within the LOS. Going beyond the radio horizon isn’t reliable for UHF, as reflections or diffraction don’t reliably provide a longer-range path under normal conditions. So the true statement is that UHF range is line of sight and depends on altitude and power.