Since the SubAir system can be installed on a progressive basis, many clubs begin their SubAir turf maintenance routine by installing the SubAir Operation Package (distributed separator, dual valve, and AC-6 ) on one, a few, or all of their greens.  After installation of the SubAir Operation Package, many clubs choose to utilize the Air Force One (SubAir portable system) on their most problematic greens. By using the Air Force One and learning how it benefits troubled areas, the next progression is to install an Elite (a SubAir permanent system) on problem greens. The Air Force One is then free to be moved around the course for regular aerification of the remaining greens.