VHF frequencies are primarily used for which type of communication?

VHF frequencies, which stand for Very High Frequency, are mainly utilized for air-band communications, making this the correct answer. Air-band communication typically operates within the VHF frequency range, which spans from 108 MHz to 137 MHz. This frequency range is designated for voice communications and navigation aids, primarily used by aircraft and air traffic control.

The effectiveness of VHF frequencies for aviation communication is attributed to their ability to provide reliable line-of-sight communication over moderate distances. This is particularly vital in aviation, where clear communication can ensure flight safety and coordination between pilots and air traffic controllers.

In contrast, long-range communication generally requires lower frequencies, which can propagate further over the horizon. High-speed data transfer typically relies on different technologies, such as satellite communications or broadband systems, rather than VHF. Very short-range communication does not utilize VHF frequencies as effectively due to their design for broader operational ranges, particularly in aviation settings.