Originally Posted by Jetalc
It's easy:
Two ways, depending on what you have available to you -
2. DME: divide your HAT by 300. If your HAT is 330', 330/300=1.1. Your VDP is 1.1 miles from the MAP. Back off 1.1 DME from your MAP, and you're good to go.
Hope I didn't screw that explanation up...
Thanks for the explanation. I always use "Gus wears a hat.", as in Glide Slope wears a HAT. A 3 degree glide slope equals 300/mile, 4 degree equals 400 and so forth. The USAF taught me to apply it from the end of the runway not the MAP though.