Description

An APAPI consists of 2 light units located on the left side of a runway in the form of a wing bar. When the pilot is:

• Well above the approach slope, both units show white.
• On or close to the approach slope, the unit nearest to the runway edge shows red and the unit farther away from the runway edge shows white.
• Below the approach slope, both units show red.

PAPI and APAPI display [Source: Transport Canada, TP 14371E TC AIM, AGA-Aerodrome, 3 October 2024, p.70]