Computes the descent rate required to lose a given amount of altitude over a given distance at a given groundspeed.
Distance to the target point in nautical miles.
Current altitude in feet MSL.
Target altitude in feet MSL.
Groundspeed in knots.
Required descent rate in feet per minute (positive value).
Computes the descent rate required to lose a given amount of altitude over a given distance at a given groundspeed.