CHAPTER II, SECTION 1 blished on the structural drawings made this layout comparatively simple; consequently, nor- mal survey methods were used. Practically all the work was accomplished in waist deep water on the ocean reef. This station alignment was accepted by the using agency with no subsequent adjustment necessary. Barge Stations 10 thru 15 were all scheduled for positioning in the lagoon off the Dog-George area. Stations 11, 13 and 14 occupied this area but Stations 10 and 12 were later moved to the Flora crater at Gene, and Station 15 was located off the lagoon reef between Charlie and Dog. The procedure for positioning Stations 11, 13 and 14 consisted of mooring the barge at the intersection of pre- determined theodolite angles from two known stations. One was a triangulation station located on the roof of Station 1528 and the other Figure 2-9. Early Construction Staking - Nan a control point located on the reef west of Station 1320 whose precise interrelation was known. Marker buoys for anchor points were set by an LCU, which was directed via radio cation of the pipe supports in the field made it possible to set supporting channels to grade before being welded. On the final alignment, adjustment screws had to be used on only one of the 470 supports. One contributing factor to this ease of alignment was the steel support, which had insignificant deflection when loaded. Station 1524 was a fan-shaped array of 38 pipes, 500 feet long. At the mirror house end, the pipes were equally spaced 7’-9” apart and were at the same elevation. At the Station 24 end they converged with no two pipes on the same grade or line. A coordinate system esta- by instrumentmen using theodolites. The Marine Department then installed the anchors. After the barge was moored, instrumentmen directed the mooring line adjustments until the point of the barge station was at the position. Simultaneously, orientation barge station was accomplished by working planned of the aligning sight points on the barge with Station 1320. The other barge stations were located by the same method: control points for Station 15 were lo- cated on Man-MadeIslands 1 and 2, and those for Stations 10 and 12 were established on the perimeter of the Mike crater. After each barge was positioned and oriented, stability checks for position were made through simultaneous observations by theodolite instrumentmen. Determination of roll and pitch, veer and yaw was made aboard the barge station. OFF-ATOLL SURVEYS. and All off-atoll construction of weather stations scientific facilities at Kapingamarangi, Kusaie, Tarawa, Wotho, Ujelang, Uterik, Rongelap and Rongerik was supported by the Sur- vey Department. Location layout and time and grades were furnished to the Construction Division. As-built plot plans were prepared that in- cluded all available information on_ utilities, sewers, and other underground installations. At Lele Harbor, Kusaie, the harbor was dragged to a depth of 9 to facilitate its use as a seaplane landing area, and marker buoys were Figure 2-10, Windbreak Used in Chaining Base Line Station 1310 to Station 24 Page 2-10 placed indicating shallows, obstructions, etc These buoys were located by a survey from shore. The buoy locations were subsequently re- corded on a harbor chart.