Accession Number : AD0771422

Title :   Color Perception in the Transitional Zones of Tricolor Glide-Slope Indicators (GSI'S).

Descriptive Note : Final technical rept. 29 Jun-29 Nov 73,

Corporate Author : CANYON RESEARCH GROUP INC GOLETA CA HUMAN FACTORS RESEARCH DIV

Personal Author(s) : Hennessy, Robert T. ; Borden, Gail J.

Report Date : NOV 1973

Pagination or Media Count : 65

Abstract : The report describes an investigation of color perception in the transitional zones of tricolor glide-slope indicators (GSI's) designed to aid helicopter night approaches to non-aviation ships. In GSI's with colors arranged, from top to bottom, yellow, green, red (YGR), an anomalous yellow or white appears in the transitional zones between the green and red color regions. This anomalous color can be misinterpreted as a too high signal and lead to a potentially hazardous descent maneuver. It was experimentally determined that the anomalous color zone occurs over an angular extent of at least .319 degrees in the GSI unit tested. (Modified author abstract)

Descriptors :   *NAVAL VESSELS, *HELICOPTERS, *GLIDE PATH SYSTEMS, LANDING AIDS, VISUAL SIGNALS, COLORS, PATTERN RECOGNITION, VISUAL PERCEPTION.

Subject Categories : Medicine and Medical Research
      Air Navigation and Guidance
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE