Same Runway, Higher Approach - About PAPI
Flying light aircrafts in and out of large airports is much easier with some flexibility, on both controller and pilot side. The main problems are the distance needed between an airliner and a light aircraft because of the wake vortex, and runway occupancy time by the light aircraft, which usually taxies slowly.
One way light aircrafts pilots can help controllers is by flying high approaches followed by a long landing - closer to the taxiway. The first picture below has been taken while flying a normal approach to Geneva runway 23, aiming at the touch down zone.
On the left hand side, one can see to white and two red lights - the PAPI. This is an optical vertical guidance system. When flying too high, the four lights are white, slightly high results in three white and one red, on slope (like on the picture) gives two white and two red lights, slightly low is indicated by one white and three red, and way low gives four red lights.

The second picture has been taken (by luck) at the same distance, approaching to the same runway, but on a high-approach. To facilitate our integration in the approach sequence the controller asked me to land long and vacate the runway using the second taxiway to the right.
The goal was to vacate quicker, and allow for an earlier line-up of the airliner wating on the left side. As you can see, the PAPI lights are all white.

Just in case you wonder, the round thing in the axis is not a flying-saucer landing pad, but a radio-navigation beacon known as VOR (more precisely a Doppler VOR).
Flying high-approach, inner circuit with short final, high-speed approach, or other special variants helps to maintain a smooth flow of traffic. But there is a possible pitfall. Don’t accept to fly anything to please a controller. It’s much better to fly a couple more 360’s than crash-landing, and if you start something that later becomes uncomfortable, I’ve two words for you: go around !
Tags: approach lights PAPI runway





