islands from.north through east~northeast were used for the tests themselves. The principal base islands were Enewetak, which bordered the Wide Passage, and Parry, northeast of Enewetak, which bordered the Deep Passage. These two islands account for about 30 percent of the atoll's land area. Parry and Enewetak had been densely populated during IVY, serving as the home and working facilities for Joint Task Porce 132 predecessor of JTF 7) except for the Air Force task group those living aboard ships. (JTF 132) (the (TG 132.4) and Included in the working facilities was an air- field occupying the southern end of Enewetak. Shops, warehouses, labora- tories, and living space occupied most of the rest of the island's area. An aerial view of Parry is shown in Figure 4, and typical Enewetak living shelters are shown in Figures 5 and 6. In preparation for CASTLE, several important additions and improvements were made at Enewetak, The first was the construction of a device assembly area on the southern end of Parry Island. 1 ee : Figure 4. The assembly area provided a specially secured, | : Yih “ 2, . me NW ae Aerial view of Parry during CASTLE. 43