VHF (Very High Frequency) radios operate within the 30 MHz to 300 MHz frequency range and are commonly used for voice communication in maritime, aviation, land-based, and emergency services. They are effective over medium to long distances, with a range of 5 to 20 miles for handheld devices and greater for base stations. VHF radios require line-of-sight communication, meaning their signals can be blocked by obstacles like mountains or buildings. These radios offer clear sound quality, low interference, and are widely used in open areas, but they can struggle in urban or obstructed environments. They are essential for reliable communication during marine adventures.