Definition
The angle, measured in degrees above the horizontal, of the descent path used by an aircraft on a precision approach to the runway. On a Precision Approach Radar (PAR) approach, the controller provides guidance relative to this published angle, typically around 2.5 to 3 degrees.
Plain English
The slope of the descent path you fly on final approach to landing, expressed as the angle it makes with the ground. A typical value is about 3 degrees — a gentle, steady descent toward the runway.
Context Anchor
Seen when briefing or flying a precision approach, including a PAR approach where the controller gives vertical guidance.
Derivation
‘Glideslope’ combines ‘glide’ (a smooth descent without power changes) and ‘slope’ (an inclined path). ‘Angle’ specifies how steep that slope is, measured from horizontal. Together: the steepness of the descent path to the runway.
Why Pilots Care
Maintaining the correct glideslope angle ensures obstacle clearance and a stabilized approach to the runway.
Grounding Statement
A normal glideslope angle gives the aircraft a steady downhill path to the runway instead of a dive or a flat, shallow approach.
Intuition Check
Do not confuse glideslope angle with the airplane’s nose angle. It is the angle of the intended descent path, not how high or low the nose looks.
Example Sentence 1
The PAR controller advised the pilot they were slightly above the glideslope angle and to adjust the rate of descent.
Example Sentence 2
PAR provides real-time corrections to help the pilot maintain the proper glideslope angle.