On VHF/UHF frequencies, Doppler shift becomes of consequence on which type of communication?

The Doppler effect is the perceived change in frequency of a wave due to the relative motion between the transmitter and the receiver. For radio waves, this frequency shift becomes noticeable and requires compensation when the relative speeds are extremely high. Low Earth Orbit (LEO) amateur satellites travel at orbital speeds often exceeding 27,000 km/h. When communicating via satellite on VHF and UHF bands, this rapid approach and departure causes the received frequency to shift up as the satellite approaches and down as it moves away, requiring operators to adjust their transceiver tuning continuously. While terrestrial mobile stations (like cars) do technically experience Doppler shift, typical highway speeds are far too slow to cause any significant or noticeable frequency drift on standard VHF/UHF bandwidths.