Reader cloud tracking. which provided a high degree of tops, anf general movements, Eoth grounc and shipboard radar were used for tracing, and the informztion from the radar locations was releyed to Keacquarters via direct telephone, 3, Other Safety Measures, a. In order to assure the safety of Task Force and native popujations anc transient surface and éir traffic, a number of other steps were taken. For example; concentrated asrial searches of the forecast fallout area were made en D-2 and Del Dexs to insure that the area was clear of transient shinping; and a constant emergency evecuation capability was meintained, b. As far as can be dcterrined fron existing monitoring data and investigations of reported incidents, no hazardous fallout occurred to populated areas or to transient surface and air craft as a result of Operation HARDTACK, BEST COPY ‘VAILABLE win > i tad een RE A ER AAR eee (c) reliability end usefullness during the first 30 minutes after detonation, was empleyed to provide information on cloud size,