Description / Abstract: This document contains Minimum Operational Performance Standards (MOPS) for Automatic Flight Guidance and Control Systems (AFGCS) and applicable interfaces. These standards specify system characteristics that should be useful to designers, manufacturers, installers and users of the system and equipment. The system may also provide workload relief to pilots and provide a means to fly a flight path more accurately to support specific operational requirements. Standards are included for the automatic flight guidance and control functions consisting of four equipment classes: Class A, autopilot, Class B, yaw damper, Class C, flight director, Class D, auto-thrust/auto-throttle and two categories of aircraft: Airplanes and Rotorcraft.