Conspicuity Of Aids To Navigation: Ii. Spatial Configurations For Flashing Lights.

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Conspicuity Of Aids To Navigation: Ii. Spatial Configurations For Flashing Lights.

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Title: Conspicuity Of Aids To Navigation: Ii. Spatial Configurations For Flashing Lights.
Author: Wagner, SL; Laxar, KV
Abstract: Lights used as aids to navigation are typically point sources that are easily confused with the background clutter of lights on shore. This study investigated the conspicuity, or how well lights of various spatial configurations stand out from a background of lights, and serves as a basis for the design of lighted aids to navigation. The measure of conspicuity was the response time for an observer to find a flashing target among backgrounds of steady lights on a CRT display. Twenty observers participated. There were nine targets tested, each at three temporal flash patterns and four background light densities. ANOVAS showed significant effects of target, flash pattern, and background. Simultaneously flashing the target elements of two horizontal bars of lights produced the greatest conspicuity, followed by two diagonal bars and a triad of lights. Search time increased with the density of background lights.
Description: Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center (http://www.dtic.mil/) is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested.
URI: http://archive.rubicon-foundation.org/8527
Date: 1996

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