Accession Number : AD0758522

Title :   The Visibility of an Underwater Display as Affected by Turbidity, Display Background Color, and the Color and Intensity of Illumination.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Webb,Alfred Norman , Jr

Report Date : DEC 1972

Pagination or Media Count : 39

Abstract : The intent of this study was to examine the effects of four environmental factors on a visual reading task in a flooded tank without ambient illumination. The primary reading task was to make an accurate vocal report of a reading on a circular voltmeter under differing conditions of turbidity, display background color, and the color and intensity of illumination. The principal facet of this research not found in existing literature was that subjects were allowed to set the illumination intensities at the lowest level they subjectively felt was needed without sacrificing accuracy or speed. Because the subjects seemed to adjust the intensities to equalize the effects of other variables, there was a statistical difference in response times only between the two water turbidities. This difference would be of slight consequence in the real world (.07 seconds). (Author Modified Abstract)

Descriptors :   (*DISPLAY SYSTEMS, *VISUAL ACUITY), (*UNDERWATER VEHICLES, DISPLAY SYSTEMS), ILLUMINATION, PERFORMANCE(HUMAN), THRESHOLDS(PHYSIOLOGY), BACKGROUND, ANALYSIS OF VARIANCE, ENVIRONMENTAL TESTS, THESES

Subject Categories : Anatomy and Physiology
      Marine Engineering
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE