of existing structures, recommended repairs, realignment of Gamma Stations and additional structures. Zero Towers. The thinking along this line has not changed. The experimental towers are designed as triangular struc=- tures 300 feet high with guys at the 250 foot level. The head house is of aluminum as described in the Reconnaissance Report. The general appearance of the towers is shown in Plate 18, Page IV-38 of the Reconnaissance Report. One of the 300-foot Towers is to be built of aluminum throughout above the 25 foot level excepting for the cables and elevator guide rails which remain steel. It is piauned at this time to completely erect one tower at the fabri-+ cator's yard in Los Angeles so that all mechanical and electrical features can be tested as well as structural connections checked for good alignment and ease of erection. Photo Towerse The two 75-foot Navy type Radar Towers now located on the Coral Head and Aniyaanii will be remodeled to the extent of providing new electrically operated hoists. The float and ladder recommended in the Recon- naissance Report will be provided at the Coral Head. The two spare towers now packaged and stored in Eniwetok will be wrected on Aomon and Runit Islands. Six new Photo Towers will be erected at the locations previously des-= cribed. These towers will be triangular in shape with sides twelve feet eight inches in dimension and guyed at the 62 foot 6 inch level. The tower height is 75 feet to the floor of the head house and this house is to be laid out to suit the photographic requirements. 4n electric motor driven hoist with guide rails is provided for handling of equipment to be used in the house. Stairs are designed on exterior face of tower for per= sonnel use. 18.