chart of a pen-and-ink recorder. The data from the numerous records were reduced to plots of both dose rate versus time and dose versus time by an electronic reading-~ computing-plotting device. Each ship transported a Navy F4U fighter aircraft which was exposed to fallout. After exposure, the aircraft were transferred to a land decontamination area upon return of the ships to Eniwetok Atoll and were subjected to decontamination studies. A similar procedure was followed for a frame supporting panels of paving, wall, and roofing materials to be studied by an Army Chemica] Corps project. These panels were exposed aboard a barge anchored in Eniwetok Lagoon during Shot 6. Studies of the phenomena aboard a ship during and after radioactive fallout were made utilizing the gamma-dose-rate detectors in addition to aerosol filters, gummed-paper TABLE 6.6 COMPARISON CF MEASURED A!D CALCULATED PEAK TEMPERATURE RISE, B-47 Deviation: Percentage deviation of calculated value from measured value. Shot 1 2 4 6 _ 211 _ _ 92.5 ~ 180° ia -30 208° 189 -22 134 110 “4 47 a1 6a 91 86 Peak Temperature Rise, 0.020-inch Skin: Measured, F Caiculated, F Deviation, percent Peak Temperature Rise, 0.040-tnch Skin: Measured, F Calculated, F Deviation, percent -16 +7 -16 -5 Peak Temperature Rise, 0.064-inoh Skin: Measured, F Calculated, F a9 110 Deviation, percent 32 62 84 65 + +61 +21 39 x 10 13 is 20 65 69 +6 Peak Temperature Rise, 0.188-inch Skin: Measured, F Calculated, F Deviation, percent -$ +32 +3 22 24 +9 *Temp-—tape values. collectors, and airborne-activity monitors distributed weatherside and in the ventilating system of the ship. Test cubicles were provided aboard the YAG-40 with different ventilating systems to evaluate the effect of different air-flow rates, and with filters or an electrostatic precipitator in the system. The contamination alighting on the ships’ weather surfaces provided conditions for two sets of experiments: (1) The gammaradiation was detected at various locations below decks and within various thicknesses of shields to evaluate the effective absorption of the radiation by steel. (2) After return of the shipa to Eniwetok Atoll, the weather surfaces were subjected to various decontamination procedures to evaluate their effectiveness and speed; inclusion of a section of wooden flight deck aboard the ships yielded data for extrapolation to aircraft carriers. Both ships participated in Shots 1, 2, 4, and 5 and were equipped for remote control operation. During the first two shots, both ships werevacated during the night before the shot and were operated from a P2V-5 aircraft, with a secondary control party aboard the USS Bairoko (CVE-115). During Shots 4 and 5, both ships were controlled by a crew stationed in a shielded section aboard the washdown-equipped YAG-39. This provision 80