Abstract: An aerial navigation instrument is provided having a housing with a window on one side and an arcuate surface on the opposite side for resting on a user's leg, a continuous map of a desired route on rollers at each end of the window and a hinged plate means along one side of said housing adapted to pivot between a first position having a first face exposed generally in the plane of said window and a second position overlying said window with a second face exposed, means on said first face removably holding a writing surface, and means on said second face removably holding an outline of approach procedure and control for a selected landing area.