Full Version: Purpose Of VDP?
On certain instrument approach plates, there is a charted VDP, given to tell you when you should begin your descent to the airport on a 3 deg glide slope assuming the field is in sight? This seems pretty important, so why don't all approach plates have them? Also, is it something mandatory to go by, or is it just to provide better situation awareness to the pilot? What if I pass the VDP but not the MAP and then I get the field in sight?
Probably because we use simple maths, like at 3,000 you decend at 10 miles, 1,800 equals 6 miles. Rounding is allowed. Once into the decent, TLAR is used. The system of TLAR is used rather a lot in aviation because it is such an superb tool.
PM
TLAR = That looks about right
PM
TLAR = That looks about right
Agreed, TLAR is awesome....
-Eric
-Eric
QUOTE(AirbusA380 @ Aug 9 2007, 11:34 PM) 
On certain instrument approach plates, there is a charted VDP, given to tell you when you should begin your descent to the airport on a 3 deg glide slope assuming the field is in sight? This seems pretty important, so why don't all approach plates have them? Also, is it something mandatory to go by, or is it just to provide better situation awareness to the pilot? What if I pass the VDP but not the MAP and then I get the field in sight?
Hey AirbusA380 - I just posted a rather lengthy comment that addresses VDPs under the thread for Visual Descent Angles. It might be what you're looking for...
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