these arrays perfectly since a tolerance of plus or minus one inch had to be taken into account. Figure 20 shows the 12-pipe array at Namu traversing the causeway built for this purpose and terminating on a man-madeisland of approximately one acre. Figures 21 and 22 show other major scientific construction in varying degrees of completion. Figure 23 shows the manhours expended for design and drafting. High density shielding concrete (limonite-steel aggregate) amounting to Ss slightly less than 500 cu. yds. was placed during this Operation. With the eee terreno ny eee ast ee en 7 tate ee ee nag 1560.02 eee ee our "et Ek otTS tsBesgifete eeie “a as eat oer pa 2% aes ees eet > Tira ee ar Longeden atNPnt Figure 21. Stations on Charlie-Baker Reef - Looking Toward the Lagoon. Stations indicated are listed as follows: Station 20 Station 1202 Station 1203 -~ - - Zero Shield with Converters 12 Pipe Array Ho, Station 1350 Series (1350.01 through 1350.12) - Mirror Towers Station 135} Station 1560.02 - Penthouse on Station 20 37 ft. Steel Tower Station 1812.01 - 40 ft. Steel Tower 46