What type of VHF frequency extends slightly beyond line of sight (LOS)?

VHF Low Band frequencies typically extend slightly beyond line of sight (LOS) due to their longer wavelengths, which enable them to diffract or bend slightly around obstacles. This characteristic allows VHF Low Band signals to travel further than just the direct line of sight, making them effective for communication in areas with light terrain irregularities or obstructions.

The VHF High Band, while also part of the VHF spectrum, generally has less range and is more line-of-sight compared to the VHF Low Band. Ultra High Frequency (UHF) primarily operates at higher frequencies, where signal propagation characteristics differ significantly from VHF, focusing more on direct line-of-sight without the same diffraction strength. High Frequency (HF) signals, on the other hand, rely on skywave propagation, which is effective for long distances but operates under completely different principles than VHF.

Understanding the propagation characteristics of these frequency bands helps in selecting the right communication equipment for various applications where line of sight may be limited.