HF Radio

High Frequency (HF) radio refers to radio communication that uses frequencies between 3 and 30 MHz. These signals can travel long distances by bouncing off the Earth's ionosphere, allowing communication over hundreds or thousands of miles without relying on satellites or cables. HF radios are used by military, maritime, aviation, and emergency services for reliable, wide-area communication, especially in remote areas. They require specialized equipment and understanding of radio propagation, but they are vital for maintaining connections when other communication methods are unavailable or impractical.