Definition
A clearly established, sustained gain in altitude after takeoff, confirmed by an increasing altimeter reading and a vertical speed indicator showing an upward trend, indicating the airplane is climbing away from the runway under control rather than merely floating in ground effect.
Plain English
The airplane is actually going up and continuing to go up after takeoff, not just hovering near the runway.
Context Anchor
Used during takeoff, especially just after liftoff and before actions such as retracting the landing gear.
Derivation
Positive comes from a Latin word meaning “placed” or “set,” and in this use it means a definite, confirmed condition. Climb means to go upward. Together, positive climb means the upward movement has been confirmed.
Why Pilots Care
Confirms it is safe to change aircraft configuration without risk of settling back toward the ground.
Grounding Statement
After liftoff, the important question is whether the airplane is gaining height above the runway.
Intuition Check
Positive climb does not mean the nose is simply up. It means the airplane is actually gaining height.
Example Sentence 1
After liftoff, the pilot waited until a positive climb was confirmed on the altimeter and VSI before calling for gear up.
Example Sentence 2
With positive climb confirmed the crew began the after-takeoff checklist.