OPERATION HARDTACK I DATE: TIME: Yucca Sponsor: GMT PPG Time 28Apr 1958 28 Apr 1958 1440 SITE: 0240 DOD PPG - USS Boxer 60 mi west of Bikini 12° 37' 163° O1' oo" 30" Site elevation: HEIGHT OF BURST: WN §E Sea level 86,000 ft TYPE OF BURST AND PLACEMENT: Air burst from free bailoon over water CLOUD TOP HEIGHT: NM CLOUD BOTTOM HEIGHT: NM REMARKS: No fallout 186