Samenvatting
The purpose of this paper is to present basic visibility information and criteria that are used for ground navigation of aircraft during low-visibility conditions. The information presented is also applicable to automobile and truck navigation and guidance in situations in which ground fog becomes a serious hazard to the motoring public. This paper appears in transportation research record no. 1316, Visibility for roadways, airways, and seaways 1991: proceedings of a conference, july 25-26, 1990, washington, d.C.