Plain English Meaning

A way of flying by instruments where, for each thing you need to control (pitch, bank, and power), you pick one instrument as the main one to watch and others as backups that confirm what the main one is telling you. Which instrument is the main one changes depending on what the airplane is doing.

Full Definition

An attitude instrument flying technique in which, for any given maneuver or flight condition, certain instruments are designated as primary (showing the most direct indication of a specific performance result that must be held constant) while others are designated as supporting (backing up and corroborating the primary indication). The primary instrument for pitch, bank, and power changes depending on the , and uses the to confirm what the primary is showing and to trends.