Internal studies within NASA had identified the practical limits of the capabilities of Saturn/Apollo systems for extended space missions without fundamental modification of spacecraft and launch vehicles: (1) Earth-orbital missions of up to 45 days and at inclinations of 0 to 90 degrees and altitudes of from 185 km up to synchronous orbits (orbital resupply could extend the duration of such missions to three months or more); (2) lunar orbital missions of up to 28 days (including lunar polar orbits) at altitudes as low as 45 to 55 km; and (3) lunar surface missions of up to 14 days at ants point on the lunar surface. Through these space activities, stated Taylor, AAP would lay the foundation for later, major ventures in space and thus would contribute significantly to the national goal of preeminence in space.