Support crews and drop off instrumentation after each shot before Ehey returned to Guam, but as no major fallout incidents occurred at Enkwetak the potential for exposure to residual radiation was small. Staffing: No personnel from TG 7.1 were associated with this projéct. The exposures for the 97th Bombardment Wing are listed with TG 7.4 but are obviously not for the crews of the Project 6.1 aircraft, a these aircraft were Guam-based. Project Report: Reference 70. Project 6.2a -- Blast and Thermal Effects on B=36 Aircraft In Flight Agencies: Allied Research Associates (ARA) Wright Air Development Center (WADC) Strategic Air Command Test Detachment (SAC) University of Dayton llth Bombardment Wing Operations: A specially instrumented and maintained B-36D aircraft (No. 49-2653) was flown in most of the shots to confirm predicted rpsponses. The same aircraft was used in similar experiments in IVY fand UPSHOT-KNOTHOLE. BRAVO, ROMEO, UNION, YANKEE (Bikini); NECTAR (Enewetak). Radiation Exposure Potential: —— Shots: The range of the aircraft from burst limited the possibility of initial radiation exposure for the flighk crew. Aircraft altitudes and slant ranges at burst time for the vafi- ous shots were: BRAVO -~ 33,000 feet (10.06 km), slant range 60,580 feet (18.46 km) ROMEO -~ 37,000 feet (11.28 km), slant range 63,580 feet (19.38 km) KOON -- 40,000 feet (12.19 km), slant range 56,570 feet (17.24 km) UNION -~ 37,100 feet (11.31 km), slant range 62,700 feet (19.11 km) YANKEE -- 40,000 feet (12.19 km), slant range 56,990 feet (17.37 km) 190