Precision Approach Path Indicator(PAPI)

Definition

A visual aid of four light units beside the runway showing the aircraft position relative to the desired glidepath. Two red and two white lights indicate correct glidepath. All red means too low.

Related Terms

Visual Approach Slope Indicator(VASI)

A system of lights beside the runway indicating approach angle. Two-bar VASI sho...

Glideslope(GS)

The vertical guidance component of an ILS providing a descent path typically set...

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