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Alchemy · September 24th, 2004, 02:42

Okay, so:

MAP - [(HAT)/(Descent Angle)]/100 = VDP.

Let me try a sample.

Say the MDA for the approach is 800 HAT and you want a 2.5 degree descent angle. The MAP for the approach is 6 DME.

6 - (800/2.5)/100 = VDP

6- 320/100 = VDP

6-3.2 = VDP

VDP = 2.8

So your VDP is 2.8 DME.

Sound right?

September 24th, 2004, 02:42	#4
Alchemy Old Skool Join Date: Aug 2001 Location: Austin, TX, USA Posts: 1,801	Re: How to calculate a VDP? Okay, so: MAP - [(HAT)/(Descent Angle)]/100 = VDP. Let me try a sample. Say the MDA for the approach is 800 HAT and you want a 2.5 degree descent angle. The MAP for the approach is 6 DME. 6 - (800/2.5)/100 = VDP 6- 320/100 = VDP 6-3.2 = VDP VDP = 2.8 So your VDP is 2.8 DME. Sound right?