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United States Department of Transportation United States Department of Transportation

Advisory Circulars (ACs)

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Advisory Circulars (ACs) search results
Number Title Status Office Date
120-26L Assignment of Aircraft Call Signs and Associated Telephonies

This Advisory Circular describes the requirements and procedures for the assignment and authorization for use of aircraft call signs in the National Airspace System (NAS), specifically, International Civil Aviation Organization (ICAO) three-letter designators (3LD), U.S. special designators, and local designators, and their associated telephonies.

Cancelled AJR-2 2016-08-25
99-1D Plan for the Emergency Security Control of Air Traffic (ESCAT)

Provides direction for the security control of civil and military air traffic during an air defense emergency.

Cancelled AJR-2 2007-01-18
120-26M Assignment of Aircraft Call Signs and Associated Telephonies

This Advisory Circular (AC) describes the Federal Aviation Administration (FAA) Air Traffic Organization (ATO) requirements and procedures for the assignment and authorization for use of aircraft call signs in the National Airspace System (NAS), specifically, International Civil Aviation Organization (ICAO) three-letter designators (3LD), U.S. special designators, and local designators, and their associated telephonies.

Cancelled AJR-2 2018-09-10
120-26N Assignment of Aircraft Call Signs and Associated Telephonies

This Advisory Circular (AC) describes the Federal Aviation Administration (FAA) Air Traffic Organization (ATO) requirements and process for the assignment and authorization for use of aircraft call signs, specifically, International Civil Aviation Organization (ICAO) three-letter designators (3LD), U.S. special designators, local designators, and their associated telephonies.

Cancelled AJR-2 2020-10-08