Definition
A takeoff performed by reference to flight instruments rather than outside visual cues, used when visibility is restricted by low clouds, fog, darkness, or precipitation. The pilot uses the attitude indicator, heading indicator, airspeed indicator, and altimeter to maintain runway alignment, control pitch and bank, and establish a stable climb from rotation onward.
Plain English
Taking off while looking at the cockpit instruments instead of out the window, because you can't see well enough outside to fly by sight.
Context Anchor
Encountered in instrument training when learning how to depart in very low visibility or when practicing the transition from outside references to cockpit instruments after takeoff.
Derivation
Instrument comes from a Latin word meaning a tool or device used to prepare or guide an action. In aviation, the instruments are the cockpit devices that show what the airplane is doing. Takeoff means the act of leaving the ground, so an instrument takeoff is a departure guided by those cockpit devices.
Why Pilots Care
Prevents loss of directional control or spatial disorientation when visibility drops below visual takeoff minimums.
Grounding Statement
Picture the airplane accelerating down a runway into low visibility: once outside cues are unreliable, the pilot keeps control by trusting the instruments.
Intuition Check
An instrument takeoff is not simply any takeoff made by an airplane that has instruments. It means the pilot is using the instruments as the main reference for controlling the airplane during takeoff and the first part of the climb.
Example Sentence 1
With fog rolling across the field at sunrise, the pilot briefed an instrument takeoff and committed to the panel as soon as the wheels left the ground.
Example Sentence 2
During the fog-covered departure, the crew completed the instrument takeoff checklist before advancing the throttles.