you are the best
VNAV it's like a glide but you don't need to create glide for each point.
This function existe in GARMIN GPS.
You approach to your destination you need to begin your approach but the weather became weak you don't have a visual contact with the ground so you activate VNAV function you choose your profile:
a distance from destination
A altitude above destination
And VNAV tel you a Required rate of descent to go from your position to new position that you have already choose in VNAV profile
This picture from GARMIN GPS user manual
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- Screenshot_2017-02-10-23-03-34.png (495.45 KiB) Viewed 9017 times
(I apologies for my weak English)