The Old VDP Question

[LongBoarder]

Gimme the info if you would.... Time and DME.... just cant remember for the life of me


Thanks in advance

 

[Andy Neill]

If I have a DME-based MAP, I use HAT/300 = Dist in nm that I adjust from the MAP.

If I have a time=based MAP, I use 10% of the HAT to give an adjustment to the MAP time in seconds.

 

[bigsky]

As stated above-just thought Id supply some numbers
For example MDA=930
TDZE 100 so we need to lose 830 feet?
I would also plan on crossing threshold at 50 so really only need to lose780 Divided by 300= 2.6 miles start descent
For time divide by 10 and 78 seconds from ry begin descent
Note this time is designed for 120 kts at faster speeds I would divide by 12 or 13 but it gets a little more complicated