Implicit and explicit horizons: landing approaches under restricted visibility conditions

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearch


This study focuses on the perceptual processes in situations where sight conditions are restricted due to fog during landing approaches. The H-hypothesis explains the functional utility of the horizon to control the glide angle to a runway visually. Under foggy conditions, horizon information is available both from the explicit (visible) and from the implicit horizon (invisible, but perceptually inferable true horizon). Based on an ecological analysis of the optics during a runway approach under foggy conditions, the functional utility of the explicit and implicit H-angle was tested as a Gibsonian invariant controlling the visual glide slope ...
Original languageEnglish
Title of host publicationEngineering Psychology and Cognitive Ergonomics : Volume 5: Aerospace and transportation systems
EditorsDon Harris
Number of pages8
Place of PublicationLondon
PublisherRoutledge, Taylor & Francis Group (GB)
Publication date17.09.2001
ISBN (Print)0754613372, 9780754613374, 9781138263765
ISBN (Electronic)9781315094472
Publication statusPublished - 17.09.2001
Externally publishedYes
Event3rd International Conference on Engineering Psychology and Cognitive Ergonomics - 2000 - Edinburgh, United Kingdom
Duration: 25.11.200027.11.2000
Conference number: 3