Vo ATOMIC DEFENSE (RADSAFS) 1. PERIOD ILSDIATELY PRIOR TO LIKD LVSVT. The washedow systems were installed and tested underway on all ships of Task Group 132.3 prior M rinus 3, ALL ships were piven an atomic defense oxercise and inspection | et the same tine the washedown systers were tested, The exercises consisted of placing observers at the following locations: Bridge, Damage Control Central, Fain Battle Dressing Station, Personnel Detontamination Station, and with at least 2 ropair partics. These observers handed out a series of simlated radiation intensity readings and observed the procedures used in collocting » recording and evaluating the radiological situation, and advising the bridge of action to be taken as a result of the radiological situation sinulated by these readings, These exercises Andieated that most ships were not intimatoly familiar with the nomonelature involved and the basic need for recording and evaluating the data. After going through the exercise the ship's personnel could readily determine where the routine could be 4mproved and a more workable and better system could be installed, The inspection consisted of checking thoitems listed in Task Gpoup Instruction No». 03440.1 dated 29 September 1952. ALL shins werechecked to ascertain that their complete allowance of radiac equipment was on board and in operating condition. BEST AVAILABLE COPY 2. M.DAY » On M day no raiioactive fallout was encountered except by the L/V HORIZON, The fallout was first detected during modium precipitation | at 1240 on i. Day while the HORIZON was circling on station in Area Baker . 110, (The HORIZON had been directed to leave its station at Seamount # 72; SECURITY INFOR}ATION Gener 120 _