o Five radiological safety monitors assigned to the evacuation
detachment to perform offsite monitoring of nearby towns and
residences

o One radiological safety monitor assigned to Guard Post 4

o Two military policemen at each of the seven guard posts (indicated
by photographs such as figures 1-3 and 1-4).


2.2 DETONATION AND POSTSHOT ACTIVITIES

Because of bad weather, the Project TRINITY director (Dr. Bainbridge)
delayed the detonation, which had been scheduled for 0400 hours. By
0445, however, the forecast was better, and shot-time was set for
0530. This gave the scientists 45 minutes to arm the device and
prepare the instruments in the shelters. The final countdown began at
0510, and the device was detonated at 0529:45 Mountain War Time from
the Control Point in the south shelter (3; 12).

No one was closer than 9,150 meters to ground zero at the time of the
detonation. With the exception of a few men holding the ropes of
barrage balloons or guiding cameras to follow the fireball as it
ascended, all shelter personnel were in or behind the shelters. Some
left the shelters after the initial flash to view the fireball. As a
precautionary measure, they had been advised to lie on the ground
before the blast wave arrived. Project personnel located beyond the
shelters, such as at the Base Camp and on Compania Hill, were also
instructed to lie on the ground or in a depression until the blast