Jim's Aviation Notes

January 14, 2010

Gavin Kerby Notes

Filed under: — jcramer @ 6:10 pm

VDP Formula (Visual Descent Point)

(MDA in AGL – TCH) / 330′ = VDP from threshold

MDA – minimum decision altitude

AGL – above ground level

TCH – threshold clearance height

Example: Odgen VOR is (452 – 50) / 330 = 1.3 nm from threshold (NOT at RUYOS)

Gavin’s Descent Rule of Thumb

Begin your decent 3nm out for every 1,000′ of descent you need.
Descent at a rate of 5 times your ground speed.

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