considered as a necessity in any future atomic tests conducted in a locality where landing facilities can be improvised. Also, the usefulness of helicopters as a means of transporting personnel and equipment to localities not accessible by light aircraft should not be overlooked in future planning. | REHEARSALS The schedule of operations outlined in the Scientific Operating Plan (Task Group 7.1) naturally exercised a primary influence on the timing of all operations throughout the task force. This schedule was oarefully coordinated withall task groups and ample proof of its adequacy was evidenced by the success of the entire operation. Its only weakness of any consequence (from the viewpoint of the air operation) was the short interval of time intervening between the full-scale rehearsal and the actual test. | As a matter of fact, this weakness had no injurious effect m the undertaking, but only because a second rehearsal prior to Xray day was not considered necessary and because the air rehearsals scheduled on Peter Yoke and Peter Zebra days were cancelled. How- ever, the amount of work required to guarantee the participation of all scheduled aircraft in a test of this nature miles it almost mandatory that the air units be permitted to "stand dow" at least sixty (60) hours prior to the time of takeoff on test operatims. Consequently, it appears important in future operations to schedule 96 Section VIII

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