Aviation call signs are unique identifiers used by pilots and air traffic controllers to communicate clearly and efficiently. These call signs can be based on the airline's name, the aircraft's registration, or a specific mission. For example, a commercial flight operated by Delta Air Lines might use the call sign "Delta 123." In military aviation, call signs often have a more personal touch, with pilots choosing names that reflect their personality or interests. These call signs help maintain clarity in radio communications, especially in busy airspace, ensuring that instructions and information are conveyed accurately and quickly.