What does the term “Very High Frequency” refer to in VOR systems?

The term "Very High Frequency" (VHF) refers to a specific range of frequencies in the electromagnetic spectrum, which is especially pertinent in aviation for navigation systems like VOR (VHF Omnidirectional Range). VOR systems utilize VHF frequencies, typically between 108.00 MHz and 117.95 MHz, which allows for reliable signal transmission over considerable distances—this is where the designation as a frequency band used for long-range communication comes into play.

In the context of aviation, VOR systems are designed to provide pilots with accurate navigational information, allowing them to determine their position relative to the VOR station, aiding in effective routing and safety during flight. The use of VHF is essential in this area, as it offers clear signals, reducing the potential for interference and allowing for precise navigation from considerable distances.

The other options mention aspects or characteristics of frequency bands that do not align with the specific utility and range of VOR systems. For instance, visual navigation primarily comprises different systems, while high-altitude radio signals and near-range communication may not fully encompass the purpose and application of the Very High Frequency in aviation navigation. Thus, the correct understanding of VHF aligns with its role in long-range communication within the aviation industry.