to dirticipate, Participation for the ORANGE shot was similar to that for TEAK, except that only one (1) rehearsal was held and it was necessary to change the H-Hour position of the P2V in order for the project to obtain usable data. The P2V aircraft was positioned by an air controller in the Air Operations Center aboard the USS BOXER for the YUCCA Event but positioned itself by its own airborne radar on the TEAK and ORANGE shots. On both of these shots, an MSQ-1A radar helped the P2V to positively mark his position after H-Hour on the last two (2) events, See Figure 9 for a summary of the fly~ ing activities of the P2V during its participation in Operation HARDTACK,. The Air Research and Development Command was responsible for furnish- ing the aircraft comprising the Very High/Ultra High Altitude’ Element, This responsibility was passed to AFSWC at Kirtland AFB, arrived at the Eniwetok Proving Ground in March 1958, to support Projects 8.2, 8.3 and 8.4. These aircraft These aircraft were | The respective interests of these projects were thermal radiation measurements, early fireball photography and thermal radiation spectrum measurements, These projects satisfied their requirements through special photographic equipment which was in- stalled on the aircraft, After YUCCA, it was decided that Project h.1, which was interested in retinal burns caused by a high altitude nuclear detonation, would place rabbits aboard the B-36's in such a way as would expose them to retinal burns from the detonation. After arrival at Eniwetok, the B-36's began to practice for the YUCCA Zvent, This event was the detonation of a small nuclear device carried | aloft by a free balloon to an altitude of between 80,000 and 90,000 feet. ° AFWLIHO quem: