, — —,,7 theiffrom the aircraft whose instrumentation measured the effects o 8 " nuclear detonation on the aircraft structure and those that measured the fissions present in the detonation, These aircraft carried instruments for a wide variety of scientific projects for the purpose of gathering data wich will enable researchers to better understand some of the phen~ omena associated with certain types of nuclear detonations, All of these aircraft were carrying instrumentation for projects interested‘in the very high and ultra high altitude shots carried out under the aegis of the Department of Defense. Originally, these aircraft were limited to the B-36 aircraft of the VHA/UHA Element, the P2V sponsored by the NASWF and the C~97 aircraft of the Ionospheric Element, Much later during the operation, other aircraft supporting other projects became active in the test series and participated in the last two (2) Department of Defense sponsored tests. The mission of the P2V was to obtain basic data concerning infra-red radiation for high altitude shots and sea level shots for correlation purposes, . The P2V aircraft arrived in the Eniwetok Proving Ground on 31 March 1958. the ZI, It flew a total of sixty hours in April and May before returning to It participated in three (3) practice missions and two (2) re- hearsals for the YUCCA Event and in that event. It also flew eight (8) practice missions for the BUTTERNUT and KOA Events and in those events. The P2V then returned to the ZI in May and returned to Barber's Point NAS in July for participation in the TEAK and ORANGE Events held at Johnston Island, On 17 July it participated in a practice for the TEAK Event and in rehearsals for TEAK on 22 and 26 July and made an emergency landing at Johnston Island, blowing tires on both main landing gears on landing. Fast maintenance enabled the aircraft to overcome its difficulties in time gieur ,— 'D AFWUHO