What is the third fundamental skill in attitude instrument flying?

In the context of attitude instrument flying, the third fundamental skill refers to aircraft control. This skill is essential because it directly impacts the pilot's ability to maintain the desired flight path and position of the aircraft despite the lack of visual references. Aircraft control encompasses the effective use of the flight controls (yoke, rudder, throttle) to manage the airplane's attitude, altitude, and airspeed.

Pilots must develop proficiency in aircraft control to respond accurately to the aircraft's instrumentation and external conditions. This includes making corrections to the aircraft’s attitude when necessary, ensuring that it remains within stable flight parameters. Mastery of aircraft control aids in preventing unintentional deviations and contributes to overall flight safety, particularly in low-visibility situations.

While instrument cross-check, power control, and precision navigation are also vital skills in instrument flying, they serve as supporting elements to the primary skill of aircraft control. Instrument cross-check helps the pilot interpret the numerous instruments correctly, power control is about managing engine output for performance, and precision navigation ensures the aircraft is on the correct flight path. However, without solid aircraft control, the effective application of these skills would be compromised.