A radio range beacon is a navigational aid that emits radio signals to help pilots or ships determine their position. Some common synonyms for radio range beacon include radio beacon, direction finding beacon, and radio navigation beacon. Other related terms include VHF omnidirectional range (VOR), a more advanced system that provides more precise navigation information, and automatic direction finder (ADF), which uses radio signals to determine the direction a plane or ship is heading. In general, these terms all refer to technology designed to help pilots or ship captains navigate, stay on course, and avoid accidents.