Definition
Flight conducted by reference to the cockpit instruments rather than by visual reference to the natural horizon or ground features, used when outside visual cues are unavailable or unreliable due to weather, darkness, or visibility conditions.
Plain English
Flying the aircraft by what the cockpit gauges show, instead of by what the pilot can see out the window.
Context Anchor
Seen in discussions of flying in clouds, reduced visibility, night conditions, and upset prevention when the outside view may not give a reliable sense of which way the airplane is pointing.
Derivation
From Latin instrumentum, meaning a tool or means by which something is done. In aviation, the cockpit instruments are the tools the pilot relies on when the outside view cannot be trusted.
Why Pilots Care
Allows continued safe flight when clouds, fog, or darkness remove outside visual references, reducing the risk of losing control of the aircraft.
Grounding Statement
In instrument flight, the cockpit instruments become the pilot’s reliable picture of the airplane’s position and motion.
Intuition Check
Instrument flight does not mean the airplane is flying itself, and it does not simply mean the flight is on an IFR flight plan. It means the pilot is using the cockpit instruments as the main reference for controlling the airplane.
Example Sentence 1
After entering the cloud layer, the pilot transitioned to instrument flight and held heading and altitude using the attitude indicator and altimeter.
Example Sentence 2
Instrument flight lets pilots keep the wings level and maintain altitude even when the sky is completely filled with clouds.