22
votes
Why would a pilot ask the tower to turn the VASI off?
It could have been a flight instructor with a student that was becoming too reliant on the VASI's slope information for visual approaches to landing, and he wanted to force the student to do without.
- 8,761
13
votes
Accepted
What does a white over red VASI indicate?
"White over red" isn't actually possible unless the VASI installation is badly off, or else if you're upside down on final. If the top lights are white, you're above their glidepath angle, and if the ...
- 49.8k
13
votes
Accepted
How to decide on which side of the runway the approach path indicator (VASI, PAPI) are placed?
Path/slope visual indicators are usually located on the left side of the runway (as seen when approaching), but may be on the right side when impractical. Good reasons for moving the aid on the right ...
- 71k
6
votes
What is the horizontal and vertical fields of view for a VASI and a PAPI approach system as you come in to land?
This information is for the US, taken from FAA Order 6850 - Visual Guidance Lighting Systems.
VASI (2 bar VASI for illustration, but other configurations exist)
a. Layout
b. Aiming
The two-...
- 71k
6
votes
How to decide on which side of the runway the approach path indicator (VASI, PAPI) are placed?
In general, the PAPI is located on the left side of the runway. However, depending upon the runway / taxiway configuration, the PAPI can be located on the right.
According to the Aerodrome Design and ...
- 100k
4
votes
What does a white over red VASI indicate?
The VASI has two sets of lights that appear white or red based on the angle from which it is viewed. If the top light is white, it means that the aircraft if flying too high. If the bottom one is red, ...
- 100k
3
votes
Accepted
What is MEHT (minimum eye height over the threshold)?
The MEHT (Minimum Eye Height over Threshold) is composed of two values: the EWH (the eye to wheel height) plus the WTH (wheel to threshold height). Both values are for the aircraft in the approach ...
- 948
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