Accession Number : AD0738132

Title :   Studies Leading to Standardization of Radar Symbology: III. Discrimination in Mixed Displays, Cathode Ray Tube Presentation.

Descriptive Note : Technical memo.,

Corporate Author : HUMAN ENGINEERING LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Davis,C. Jane

Report Date : DEC 1971

Pagination or Media Count : 107

Abstract : The report covers continued experiments toward standardization of radar symbology. Ten code complexes previously used in paper and pencil tests have been replicated on a cathode ray tube (CRT). Each code consists of five geometric symbols representative of a display vocabulary. Thirty subjects repeatedly selected individual symbols from a mixed display. Performance was measured in terms of errors and time to locate. The best and worst codes confirmed paper and pencil experiments previously reported. Times and errors were consistently greater on the CRT. Symbol characteristics contributing to reduced efficiency are analyzed and tentative rules for CRT symbols are presented. (Author)

Descriptors :   (*SYMBOLS, DISPLAY SYSTEMS), (*DISPLAY SYSTEMS, RADAR EQUIPMENT), STANDARDIZATION, RADAR, CATHODE RAY TUBES, MAN MACHINE SYSTEMS

Subject Categories : Active & Passive Radar Detection & Equipment
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE