Station 56 — The Aomon Group - NBS, The sketches for this station were furnished March 18, 1950, Originally two of these stations were required, but the one on Bogallua was deleted at the time the test on Bogallua was removed from the program, The station was essentially the same as the Station 55 except that the inside dimensions were set at 13 feet, 6 inches by 15 feet by 6 feet, 6 inches high, The structural drawings were completed on June 6, 1950, with the electrical and mechanical drawings following a month later, Station - Runit and Engebi - NBS. These stations had the same design history as Station 54. The basic requirements were the same,and the data was furnished and checked at the same time as that for Station 54, The only difference was that because of the difference in distance from zero, the steel reinforcement in Station 57 was designed to develop the full value of the concrete wall and roof thicknesses specified by the User, It was felt that these stations would not be seriously damaged whereas the Station 54 structures were expectedto suffer damage. Stations and 62 - Te 4 chi, Bokonaarappu tower southeast of Runit, and Pliraat - EG&G, These were the 75 foot photo tewers described in Chapter 5.11 of this Volume, Tolerances established by the User for the final locations were 0,1 per cent of the distance from zero and + 6 inches between photo towers on the same island, Stations 61 and 63 - Teiteiripucchi, Bokonaarappu, Piiraai, and Site HasoutheastofBanks—_teee- The sketches for these structures (battery units) were provided H&H on January 24, 1950, -for each photo tower, (See Station 60. ) One building was required The choice of building material was left to H&N discretion, The final buildings were of wood framing with an aluminum skin over the wood sheathing, The aluminum was used because of its resistance to salt spray, On Teiteiripucchi, Bokonaarappu, and Piiraai, it was possible to erect the building on soil. However, Site M was on the coral reef, which was covered with water twice a day. This necessitated a few changes in the photo tower shaft at that site. The station was located at the 25 foot elevation inside the tower shaft, the flooring being wood instead of concrete as used on the ground locations, The inside clear dimensions were 6 feet by 7 feet by 7 feet, 11 inches high, Because of the anticipated loading, the studs were 2 inch by 8 inch on 12 inch centers and the roof joists were 2 inch by 10 inch on 12 inch © centers, Station 64 - Teiteiripucch! and Piiraaj - EG&G. In order to have a power source other than batteries on the photo islands, these small power stations were built. These buildings housed a pair of 50 kw diesel generators and the necessary control panels, <A small annex housed the timing controls for the island, The framing for roof and walls was 2 inch by 8 inch wood members on 16 inch centers, The exterior wood sheathing was covered with an aluminum sheeting, The building had two rooms; one, the power room, was 14 feet by 15 feet by 8 feet high, and the other, the timing rooh, was 6 feet by 4 feet by 8 feet high, The 4 foot dimension in the small room was changed to 8 feet on October 4, 1950. 5-166