Fed C of A is an abbreviation for the term "Federal Certificate of Authorization". A certificate granted by the Federal Aviation Administration (FAA) in the United States, it signifies that an organization or individual has the authorization to operate specific unmanned aircraft systems (UAS) for commercial purposes. Synonyms for Fed C of A include Federal License for Drone Operation, FAA Permit for Commercial Drone Use, and Federal Aviation Administration Certificate for Unmanned Aircraft Systems. All these terms highlight the same concept: official authorization by the FAA to conduct commercial operations with unmanned aircraft, ensuring compliance with the necessary rules and regulations for safe and legal drone usage.