Definition
In a ground-controlled intercept (GCI) operation, the geographic point on the ground directly below the position in the air where an interceptor aircraft is predicted to make contact with its target. Used by ground controllers to vector the interceptor onto the target.
Plain English
The spot on the ground directly underneath where two aircraft are expected to meet in the air during a controlled intercept. Controllers on the ground use it as a reference to guide the intercepting aircraft toward the target.
Context Anchor
Used in instrument approach and glide path discussions, especially when describing where a descent path meets the runway surface.
Derivation
Intercept' comes from the Latin 'intercipere,' meaning 'to seize between' or 'cut off.' The 'ground point' part simply names the location on the surface used as a reference for the intercept happening above it.
Why Pilots Care
It tells the pilot where the aircraft should touch down if the glide slope is followed precisely, which affects landing distance and obstacle clearance calculations.
Grounding Statement
Picture the glide path as a straight sloping line aimed toward the runway; the ground point of intercept is where that line reaches the runway surface.
Intuition Check
Do not read intercept here as catching another aircraft or joining a course. In this term, it means the point where the downward path meets the ground.
Example Sentence 1
The radar controller calculated the ground point of intercept and issued a heading change to bring the fighter onto the target.
Example Sentence 2
Knowing the ground point of intercept helps verify that the landing distance available is sufficient for the aircraft.