oe amet ene hel Lene Releaga initial calibration of instrumentation should be completed with maximum concentration on completion of critical diagnostic experimentation. The greatest number of personnel possible, consistent with completion of the mission, will be returned to the ZI. The rehearsal day for Mike Shot (MX-day) will be an- nounced on or about 1 October 1952. The Mike Shot phase may be considered as from 15 Octo ber to 5 November 1952. The final placement of instrumenta- tion and its calibration will be accomplished. The MX date determination for cryogenics, electronics, and Firing Party are contingent upon the decision to be made on or about 1 October. The final test preparation, the operation of critical base facilities, and instrumentation do not permit a full-scale evacuation rehearsal. However an evacuation exercise will be conducted sim- lating actual evacuation procedure with task unit and project group representatives. Appropriate signs and placards will be prepared to use aboard each ship, small craft, and the beach; assembly areas will be designated, guileMls will be briefed, and small craft will be assigned. Again remaining personnel will be screened to return to the ZI all those not essential to the acconplishment of the final Mike phase. Certain personnel whose pre- sence in the Forward Area will not be required if device operations proceed smoothly, but who may be required if unpredicted difficul- ties arise, will be evacuated to Hawaii on an "on call status", ~ 4h - ay