Transcription of M1 = Horizontal PAP Coordinate M2 = Vertical PAP ...
1 " *Positive axis point (PAP) must be measured from the center of = Horizontal PAP CoordinateM2 = Vertical PAP CoordinateIntersection of M1 and M2 = M3M3 = Lightning ArcThis chart uses spherical geometry to find the hypotenuse of the spherical right triangle created by the Midline and VAL.