seconds from

1
Visual Descent Point (VDP) Timing Method
seconds from FAF to MAP
FAF
MAP
-
seconds from FAF to VDP
VDP

seconds from VDP to MAP
2
Visual Descent Point (VDP) Height Above Touchdown
(HAT) Method
FAF
1600 MSL
MAP
VDP
MDA 600 MSL
HAT 1600 - 200 1400 1400/300 4.67 NM
TDZE 200 MSL
300 feet per NM
3
Visual Descent Point (VDP) Height Above Touchdown
(HAT) Method
GS 90 Distance travelled 1.5 NM per
minute 4.67/1.5 3 minutes 1400 feet/3 minutes
500 FPM OR using HAT/600 2.33/1.5 1.5
minutes 1400 feet/1.5 minutes 900 FPM