Which agency issues foreign air carrier permits to designated airlines?

The agency responsible for issuing foreign air carrier permits to designated airlines is the Department of Transportation (DOT). This function is part of the DOT's broader role in regulating and overseeing air transportation, which includes ensuring the safety and economic efficiency of domestic and foreign air carriers operating in the United States.

The DOT assesses applications for foreign air carrier permits based on several criteria, including the applicant's operational safety record, financial stability, and compliance with U.S. aviation laws and international agreements. This process is crucial for maintaining the integrity and safety of the aviation industry, as it ensures that foreign carriers meet U.S. standards before they can operate flights to and from the United States.

Other agencies mentioned, such as NASA and the FAA, have distinct roles in the aviation sector. NASA primarily focuses on the nation's civilian space program and aeronautics research, while the FAA is responsible for regulating civil aviation in the U.S., including aircraft operations and maintenance. The National Transportation Safety Board (NTSB) investigates transportation incidents and accidents but does not handle the granting of permits. Therefore, the DOT is the correct agency for issuing foreign air carrier permits.