UNLESS OTHERWISE STATED ON THE DRAWING, WHEN DATUM TARGETS ARE USED TO ESTABLISH A DATUM REFERENCE FRAME, THE DATUM PLANES SHALL BE ESTABLISHED IN TRUE AIRCRAFT COORDINATES (FS, WL, BL). THIS MAY RESULT IN OFFSET (STEP) DATUM TARGETS. THE BASIC DIMENSIONS DISPLAYED ON THE RELATED VIEWS OR DISPLAYED IN TABLE FORMAT ON A DRAWING, DEFINE THE OFFSET (STEP) BETWEEN THE TARGETS. THE ESTABLISHED DATUM REFERENCE FRAME SHALL BE COINCIDENT WITH THE FIRST DATUM TARGET OF EACH DATUM PLANE (I.E. A1,