‘® Program 2, Nuclear Radiation and Fallout; Projects 2.1, 2.2, 2.3, 2.5a-b, 2.6a-b Program 3, Blast Effects; Projects 3.2, 3.3, 3.5 Program 6, Systems Effects; Projects 6.2, 6.2a-b, 6.4, 6.5, 6.6 @® Program 7, Electromagnetics; Projects 7.1, 7.2, 7.4 @ Program 9, Cloud Photography. Chapter 3 contains a detailed description of these projects as well as a description of the participation of the DOD in other portions of the CASTLE experimental programs. The locations of instrument stations for these projects are indicated in Figure 54. The locations of the ships of the fleet at burst time are shown in Figure 55. Aircraft missions and positions are given in Table 20. THE TEST At 0645 the firing signal was sent and the device exploded, releasing the energy equivalent of 15 million tons greater than expected. km) (MT) of TNT. This yield was much In a few seconds, a fireball nearly 3 miles in diameter had formed, and a crater about 1 mile (1.6 km) 200 feet (60 meters) deep was gouged from the reef off Nam. (4.8 across and The illumina- tion from the fireball was visible for nearly a minute on Rongerik, 135 nmi (250 km) east of the burst. ing boat 85 nmi (157 km) It was also observed on a Japanese fish- east-northeast of Bikini. fireball had risen to 45,000 feet Within 1 minute the (13.7 km) and the pulverized coral from the crater was pulled up into a cloud that was already 3 miles across with a stem 2,000 feet (4.8 km) (600 meters) wide. Within this first minute, the blast wave from the explosion had moved outward from the burst point, stripping the nearby islands of vegetation. The blast wave was received with diminished force 14 nmi (22.5 km) across the lagoon at the evacuated camp on Eneman, where it damaged considerably the lightweight temporary buildings (Figure 56). An electrical short cir- cuit caused a fire, destroying much scientific equipment 205 (Figure 57). The