Human Factors Issues in the Use of Night Vision Devices

Abstract

Electro-optical imaging systems have been integrated into rotorcraft operations, allowing pilots to fly at very low altitudes and avoid obstacles in reduced visibility. The hardware characteristics of these systems result in visual displays which differ significantly from unaided, daylight vision. The impact of these differences on perceptual performance (and, ultimately, on pilotage) is poorly understood. In this paper, we identify critical human factors concerns suggested by field data and review empirical studies of performance on flight-relevant perceptual tasks, notably depth and distance perception. Hardware modifications to improve man-system performance are suggested.