H79.142.10N

Photograph. Description: n. Checkered trucks, identified on back as "Ground Control Approach (GCA) equipment in operation at the Oakland Municipal Airport. This radar device, developed by the Navy, allows planes to land in the densest fog." Also on back are pencil instructions for printing. Severly creased and scratched. Also credit "J. Walter Frates". Condition: very good condition except as noted.