Accession Number : AD0023510


Title :   INFORMATION CAPACITIES OF MANUALLY PLOTTED DISPLAYS


Corporate Author : TUFTS UNIV MEDFORD MA


Personal Author(s) : KRULEE, GILBERT K ; BOND, HUDSON J


Report Date : Jan 1953


Pagination or Media Count : 28


Abstract : This report summarizes the result of an empirical study of the inofrmational capacity of manually plotted vertical displays as used in Combat Information Centers of certain major combatant vessels of the United States Navy. The display was operated by six plotters, all of whom operated from the rear of the board. Under normal operating circumstances, these plotters would have available to them two sources of information. The four sector plotters would plot inofrmation obtained from own ship's radar while the two 'summary' plotters would plot supplementary information obtained from other ships operating in the immediate area. In these experiments, plotters were required to operate under various conditions of input load and under circumstances involving physical interference between the plotters. It was demonstrated that the plotters could operate at fairly high levels of efficiency provided load inputs did not exceed seven plots per minute per plotter. However, there was some decrement in performance as a result of the physical interference between plotters. It was noted that performance effectiveness decreased as the total display became highly cluttered with plotted information. Plotter saturation was not particularly reflected in increase in range and beaming errors, but in complete omission of plots or in increased time lags in individual plots.


Descriptors :   INPUT , HIGH RATE , PHYSICAL PROPERTIES , NAVY , EFFICIENCY , RADAR , DISPLAY SYSTEMS , SATURATION , VERTICAL ORIENTATION , INTERFERENCE , SHIPBOARD , MANUAL OPERATION , NAVAL VESSELS(COMBATANT) , PLOTTING , COMBAT INFORMATION CENTERS , PLOTTERS


Distribution Statement : APPROVED FOR PUBLIC RELEASE