Which statement best describes Very High Frequency propagation?

Which statement best describes Very High Frequency propagation?

• A. They bend around the ground like ground waves
• B. They reflect off the ionosphere like HF waves
• C. They propagate into space and require line-of-sight
• D. They travel only at very short ranges

Answer: (C)

Very High Frequency signals rely on a direct line-of-sight path between transmitter and receiver. At these frequencies, the waves travel in a straight line and are not appreciably reflected by the ionosphere, nor do they spread around the Earth like ground waves. That means your communication range is mainly limited by the height of the antennas and the terrain; you can extend it by lifting the antennas or by using relays or satellites, which effectively place the signal “into space” and bring it back down to another location. So the statement that VHF propagation depends on a line-of-sight path (and can involve space or satellite links) best captures how VHF behaves. The other descriptions describe lower-frequency ground waves or ionospheric skywave behavior, which don’t apply to VHF.

Very High Frequency signals rely on a direct line-of-sight path between transmitter and receiver. At these frequencies, the waves travel in a straight line and are not appreciably reflected by the ionosphere, nor do they spread around the Earth like ground waves. That means your communication range is mainly limited by the height of the antennas and the terrain; you can extend it by lifting the antennas or by using relays or satellites, which effectively place the signal “into space” and bring it back down to another location. So the statement that VHF propagation depends on a line-of-sight path (and can involve space or satellite links) best captures how VHF behaves. The other descriptions describe lower-frequency ground waves or ionospheric skywave behavior, which don’t apply to VHF.