The head-up display (HUD) interface of the Gripen fighter aircraft utilizes a sphere concept for supporting attitude awareness or spatial orientation (SO). With the sphere interface fixed to the gravitational vertical and the attitude variant aircraft positioned in the center of the sphere, the HUD field-of-regard scans parts of the sphere inside. The HUD interface depicts segments of latitude circles with meridian markings that convey integrated information of pitch, roll, and yaw. To enhance pilot-in-the-loop maneuvering and SO we suggest a wide field-of-view interface design of the Gripen concept, emphasizing the inclusion of peripheral vision. The suggested interface is subsequently integrated with peripheral visual flow to improve SO primarily in instrument meteorological conditions. Implemented in future head-up flight displays systems it could perhaps contribute to a more successful combating of pilot spatial disorientation.
& von Hofsten, C.
(2005). Towards Wide-Field Display of the Gripen HUD Interface to Combat Spatial Disorientation. 2005 International Symposium on Aviation Psychology, 225-230.