FIG. 1 is a top plan view of an aircraft nagivation plotter showing my new design, the lower circular transparent disc having been rotated for exemplary purposes, so that 265 subjacent opaque base plate and the arrows on the uppermost substantially semi-circular transparent plate point respectively to 115 295

FIG. 2 is an elevational view of one side edge, the elevational view of the opposite side edge being substantially a mirror image thereof;

FIG. 3 is an elevational view of one end edge of FIG. 4, the elevational view of the other end edge being substantially a mirror image thereof; and,

FIG. 4 is a bottom plan view.