Definition
A steep, intentional descent of an aircraft along a flight path well below the horizontal, typically at a high nose-down pitch attitude and often involving a rapid increase in airspeed.
Plain English
A deliberate, sharp downward flight where the nose is pointed well below level and the aircraft descends quickly.
Context Anchor
Seen in flight maneuver descriptions, emergency recovery discussions, and accident reports.
Derivation
From Old English 'dyfan,' meaning to plunge or sink. The aviation use carries the same sense of a deliberate, steep downward movement, which is why the word transferred naturally from swimming and diving into flight.
Why Pilots Care
A dive can build airspeed quickly, potentially exceeding the aircraft's never-exceed speed (Vne) or structural limits. Recovery requires careful pitch control to avoid overstressing the airframe or losing excessive altitude.
Intuition Check
Dive does not mean any descent. In aviation, it means a steeper nose-down descent than normal, often with speed building quickly.
Example Sentence 1
After spotting traffic well below, the pilot entered a shallow descent rather than a dive, keeping the airspeed within normal cruise limits.
Example Sentence 2
The instructor demonstrated a dive recovery by smoothly raising the nose and adding power to return to level flight.