constructionof an air-conditionedroom, 12 feet by 12 feet by E?feet, elevatedto a height of approximately 15 feet. For details, see DrawinC No. FF51. Reflector Tower (Parry Island). Requirements existed for the erection of a wooden tower 15 feet in height, strong and large enough to support two 30-inch searchlightreflectors. Telemetering Installations (parry Island). Con%ruction to satisfy these requirementsconsisted of rehabilitatingan existing ~uonset hut, installing electric generators, placing guy wires on a 100-foot steel Navy survey tower, string strands of co-axial cable to the top of the tower, and placing a 22-foot wooden antenna mst atop the 100-foot tower. Seismograph Stations (Parry Island). Two stations (see Drawing No. E-47A) were placed on the island as far apart as was possible geographically. The azimuth to Runit Zen tower was computed. Both sta,tionswere tied into the Control Station by ditched 2 conductor wire, involvingabout 7800 feet of ditching. Drone Operation Requirements (Eniwetok Island). The drone operation requirements consisted of a radio-chum laboratory, drone arrester gear and parking slots, and drone control tistallations. The work on the radio-them laboratory consisted of rehabilitating an existing Quonset hut, installingwork benches, utility outlets, generators,and a water supply. The drone arrester gear consisted of a series of ditches across the north end of tb main runway, and also required tistallationof a series of deadmen on the sides of the runway for the attac~t Section XVI of nylon