High Frequency Radio, often referred to as HF radio, operates within the frequency range of 3 to 30 megahertz (MHz). It is commonly used for long-distance communication because its signals can bounce off the ionosphere, allowing them to travel beyond the horizon. This makes HF radio popular for maritime, aviation, and amateur radio communications. HF radio is also utilized in various applications, including emergency services and military operations. Its ability to maintain communication over vast distances, even in remote areas, makes it a reliable choice for users who need to connect without relying on modern infrastructure like cell towers or the internet.