DESIGN OF AUGMENTED REALITY TOOLS FOR AIR TRAFFIC CONTROL TOWERS Ronald J. Reisman and David M. Brown A series of head-tracking, see-through, head-mounted display prototypes were developed and evaluated by five controllers at Moffett Field air traffic control tower. The controller cadre identified several deficiencies in the initial prototype, such as low optical transmissivity of the display, unacceptable compensation for tower lighting conditions, inadequate symbology and data block information display, and unacceptable discomfort caused by wearing the head-worn displays. Though the cadre found the initial prototype too immature for operational use, they were unanimously supportive of the potential for augmented reality technology to eventually address operational tower issues. These issues include surface control, coordination with facilities and vehicles, information acquisition and runway incursion.