Relationship Between Recognition Range and the Size, Aspect Angle, and Color of Aircraft
HUMAN RESOURCES RESEARCH ORGANIZATION ALEXANDRIA VA
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OBSERVERSReduced-scale field tests were conducted using 172nd scale model aircraft to estimate the relationship between aircraft size presented area and recognition range by ground observers equipped with binoculars. The overall size, color, and aspect angle view of the models were varied. The observers were highly trained and well-motivated members of the military and civilian research staff. The average recognition ranges and accuracy levels obtained far exceeded previously published data, being in the realm of detection ranges. The dark grey models having a reflectance similar to camouflaged aircraft were recognized 1900 meters full-scale sooner than aluminum-colored models. Aspect angles affected recognition range, as did overall size. Trial- to-trial reliability was high for each view, but there was little consistency in the recognition ranges between different views.
- Humanities and History
- Antiaircraft Defense Systems