of the tower and placing a twenty-two foot wooden antenna mast atop the 100 foot tower. Seismograph Stations (Parry Island). Two stations were placed on the island as far apart as was possible geographically. azimuth to Runit Zero tower was computed. The Both stations were tied into the Control Station by ditched two conductor wire, involving about 7800 feet of ditching. Drone Operation Requirements (Eniwetok Island). The drone operation requirements consisted of a radiochem laboratory, drone arrestor gear and parking slots and drone control installations. The work on the radiochem laboratory consisted of rehabilitating an existing Quonset hut, installing work benches, utility outlets, generators and a water supply. ° The drone arrestor gear consisted of a series of ditches across the north end of the main runway and also required installation of a series of deadmen on the side of the runway for the attachment of nylon ropes. To protect parked planes from drones out of control, four barricaded parking slots were constructed. Drone control installations involved the construction of a drone control platform, two searchlight platforms, rehabilitation of a Quonset for an electronics lab, marking of the airstrip center line, marking a twenty foot wide caution strip across the runway and marking of taxi-ways on the apron. AEC Vault (Eniwetok Island). A reinforced vault for temporary storage of the weapon was constructed. Section VIb 55 ‘

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