om——— ships laid inside the lagoon seven strings of mines (123 in all), plaster filled but with complete mechaniams. One hundred mines were recovered after the shot, many of thea contaminated. All obviously damaged aAinca were jettisoned after careful examination and photo- graphy; forty-eight in good conlition were returned to Pearl Harbor for etudy. 25. All reoovery work was coupleted befare YANKEE, Project 6.4, the Savy Burean of Ships sponsored project for proof testing atomic warfare countermeasures, has received extensive coverage in CTG 7.3 Final Heport, and some in the Redielozical Safety ; chapter of thie installment, so adescription of the Project is omitted here, The drone ships, YsG-39 ami YAG-40, especially reactivated fren the Maritime Adainistration *“mthball" Mest, were necessarily devoted nearly exclusively to this Project. ‘Thay were howsver used for another parpose, at least in planning, when their evacuation potential was depended upon in some of the ecrlicr MECTAR sorties, thereby pernit~ ting other units to centinue essential work at Bikini, Yad 39 was actually enployed in on early H:CTAR sortie laying fallout buoye for Project 25a, As temier to the YA0s, WOLALA was employed almost ex- Glusively on Mroject 6.4, assisted at shot times by TAMALONI. A PAYS eapectally ejuipped to control the drones was used entirely on this Project. Two helicopters of HIR-3462 were also fitted with drone santrol gear to back ap the P27§ if necessary. Kigor_guppert 2. Boat roal boasts ascisted two of the threes projects requiring Binor support. froject 1.6, ® stity of water waves sponsored by the