A vertical deviation indicator and predictor includes a vertical deviation
scale having a plurality of vertically spaced markers, one of the markers
indicating the vehicle's present vertical position. Current vertical
flight path segment symbols are selectively superimposable over the
vertical deviation scale in accordance with the vehicle's current
vertical flight path segment. Next vertical flight path segment symbols
are selectively superimposable over the vertical deviation scale in
accordance with the vehicle's next vertical flight path segment, the
position thereof being determined by backward extrapolation of the next
vertical flight path segment. Thus, the type and position of the current
and next vertical flight path segment symbols on the vertical deviation
scale provide situational awareness of the present vertical flight path
deviation and an indication of an efficient and timely manner for
intercepting the desired flight path.