Definition
A diagram or planned sequence showing the airplane's vertical and lateral path from brake release through the initial climb, including the points at which specific actions occur — such as rotation, liftoff, gear retraction, flap retraction, and the transition to the en route climb.
Plain English
A picture or plan of how the airplane should leave the ground and climb away, showing what the pilot does and when, from the start of the takeoff roll until the airplane is established in the climb.
Context Anchor
Seen in takeoff training diagrams, pilot briefings before takeoff, and aircraft procedures that describe what to do after the airplane leaves the runway.
Derivation
Departure' comes from Old French 'departir,' meaning to leave or go away. 'Profile' comes from Italian 'profilo,' meaning a side view or outline. Together, the term literally means 'a side view of the leaving' — which is exactly what the diagram shows: the airplane's path away from the runway, viewed from the side.
Why Pilots Care
Ensures the aircraft clears obstacles safely and follows standardized climb gradients after takeoff.
Grounding Statement
Picture a line drawn from the runway into the sky showing where the airplane should be, and what it should be doing, during the first part of the flight.
Intuition Check
A departure profile is not just “leaving the airport.” It means the planned shape and sequence of the takeoff and climb away from the airport.
Example Sentence 1
Before takeoff, the instructor reviewed the departure profile, noting where the student should rotate, retract the flaps, and begin the cruise climb.
Example Sentence 2
Following the published departure profile kept the aircraft above all obstacles during the initial climb.