Computer Reservation System Coverage for U.S. Domestic Airlines: Implication for Passenger Profiling [open pdf - 753KB]
"This report details Computer Reservations System (CRS) coverage of U.S. domestic airlines. Specifically, this report assesses the number of U.S. Domestic airline passengers whose travel is not covered in a CRS. This number will be used to decide if a manual domestic passive profiling system, tailored for passengers not covered by a CRS, is required to augment an automated system that is currently being developed. This report concludes that the number of passengers not covered by a CRS is small, and that development of a manual instrument is not warranted. This report also provides recommendations for the direction of future aviation passenger profiling research."
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/