which did not affect the overall docunentation. A total of 7,500 feet of 35 mm Eastman Color Negative was exposed on this event. The UMBRELLA event was the element's biggest effort during the entire operation. All available cameramen operated forty-four cameras of all types in the air and on the ground. For this event, documentary photo cameramen operated technical photo cameras mounted in the C-54's. All camera equipment operated satisfactorily, except one set of remote cameras in place on HENRY Island (MUI). These cameras were equipped with 17 inch lenses directed on three (3) target destroyers. Failure of these cameras to operate was due to a malfunction of their own electronic The EGG signal tripped and operated the relay system satis- factorily but camera motor relays failed to respond. = Camera failure on HENRY Island (MUI) did not affect the overall documentation. i time circuit. Back up remote cameras on GLENN Island covered a portion of the test cestroyers with excellent results. It was later determined that the HENRY Island sensitized stock loaded in magazines atop the remote cameras received sufficient fallout to ruin the filr. A total of 8,359 feet of 35 mm: Eastman Color Negative was exposed for this event. Positioning of aircraft to provide aerial photography of the UMBRELLA and WAHOO were practically identical. One (1) RE-50 flew a race track pattern directly over surface zero at 25,000 feet, positioned to be 1,000 feet short of surface zero at Time Zero. The second RE-50 was positioned ten miles Northeast of surface zero at 2,500 feet and following detonation, turned into the water spray column. Two (2) photo C-54's were positioned Northwest of water zero at 20,000 feet horizontal ManageSL Co;