SlleoialCircuits. In addition to the normal c~ioatim common to the opera- tion of a purely naval task foroe, the Atomio Energy Commission required special circuitsto oover the technical phases of the projected atomic weapons tests. After eonsiderable disoussionwith representativesof the Atomic Energy Conscission, requirmnents for the follting circuits or nets were established. RadiologicalNet. Sinoe &e safety of operatias”in the target area after the blast depends upon tha reports of the various radiological safety monitors, this net was considered to be of prime importance. It provided a means of rapid voioe ccamnunioation between the 12 radiological safety parties and radiologicalsafety oenters located in MT. MCKIILEYd BAIROKO. TWO types of radio equipmentswere selected since both fixed stations and mobile stationswere involved. The Model SCR-300 FM voice portable set weighing approximately 35 pounds was selected for the mobile radiological safety parties ashore and radiological safety personnel to the blast area. Each of tie four landing craft, in addition to being equipped with an SCR-300, had installed one Model TCS crystal controlledHF voioe traneueiverused to transmit reports direct to the Radiological Safety Center in MT. MCKINLEY and BAIROKO. Model TCS or TIE tobe employed ti HT. MCKIHLEY and BAIROKO. Se&ion XI . 78 @tI$WT