Summary of External Doses for Operation PLUMBBOB as of 1 May 1986 Gamma Dose (rem) 0-0.5 0.5-1 1-3 3-5 5-10 10+ Army 6,242 737 528 55 22 2 Navy 401 36 130 4 2 1 1,678 118 102 22 18 4 726 1,244 176 1 1 0 819 22 22 0 0 0 Air Force Marine Corps Civilian DOD Participants 4.15 OPERATION HARDTACK I. HARDTACK was the designation for U.S. nuclear testing in both the Pacific and in Nevada during 1958. Phase I, discussed in this section, consisted of 34 Pacific nuclear detonations, which was as many as had been fired in all prior oceanic tests. The series encompassed a wide variety of events, as indicated in the accompanying table (19: 23,24). All but two of the detonations were at Enewetak and Bikini Atolls in the Marshall Islands. TEAK and ORANGE, high-altitude detonations, occurred 42 and 76 kilometers over Johnston Island, which lies about 700 nautical miles westsouthwest of the Hawaiian Islands. A Honolulu resident described the TEAK burst, which took place 10 minutes before midnight, in a front-page story for the 1 August Honolulu Star-Bulletin (19: 1,266): I stepped out on the lanai and saw what must have been the reflection of the fireball. It turned from light yellow to dark yellow and from orange to red. The red spread in a semi-circular manner until it seemed to engulf a large part of the horizon. A cloud rose in the center of the circle. quite large and clearly visible. for about a half hour. 119 It was It remained visible