Smart approach detection

Smart approach detection can evaluate:

• expected glide slope
• altitude too high or too low
• excessive descent rate
• heading and lateral approach alignment

Config.SmarterApproachEnabled = false
Config.GlideSlopeFactor = 0.052
Config.AltitudeTolerance = 25.0
Config.MaxDescentRate = 10.0

When Config.SmarterApproachEnabled = false, the legacy approach behaviour remains active.