THE FINAL APPROACH SPACING TOOL T. J. Davis, K. J. Krzeczowski, and C. Bergh Abstract A system for assisting terminal area air traffic controllers in the management and control of arrival traffic, referred to as the Final Approach Spacing Tool (FAST), is being developed at NASA Ames Research Center. In a cooperative program, NASA and the FAA have efforts underway to install and evaluate the system at the Dallas/Fort Worth Terminal Radar Approach Control facility beginning in 1994. This paper will review the algorithmic components, the human-machine interface, and the results of recent simulations.