point of origin


initial point (IP)

i. A well-defined point, easily distinguishable visually and/or electronically, used as a starting point for the run-in to the target.
ii. A point close to the landing area where serials (troop carrier air formations) make final alterations to the course to pass over individual drop or landing zones.
iii. That point from which any survey is initiated. Also called the point of origin.