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ACS Task
A discrete knowledge, risk-management, and skill unit inside an Airman Certification Standards area of operation. Each ACS task lists what an applicant must know, what risks to manage, and what maneuver or procedure to demonstrate to standard on the practical test.
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- Actual InstrumentFlight time logged when the aircraft is operated solely by reference to instruments in actual instrument meteorological conditions (IMC), without a view-limiting device. Actual instrument is distinct from simulated instrument time and is conventionally recorded in a separate logbook column; 14 CFR 61.51(g) governs how instrument time is logged.
- ADM (Aeronautical Decision-Making)A systematic approach to the mental process used by pilots to consistently determine the best course of action in response to a given set of circumstances. ADM incorporates risk management, situational awareness, and sound judgment.
- ADS-B (Automatic Dependent Surveillance-Broadcast)A surveillance technology in which aircraft broadcast GPS-derived position and other data. ADS-B Out is required in much of controlled airspace; ADS-B In can deliver traffic and datalink weather that pilots use for strategic in-flight decisions, not close tactical maneuvering.
- Adverse YawThe tendency of an airplane to yaw opposite the direction of aileron roll because of unequal induced drag between the up-going and down-going wings. Adverse yaw is corrected with coordinated rudder during roll-in and roll-out and is distinct from left-turning tendency, which always pulls left under high power and low airspeed.