For obvious reasons these photographs no more than hint at the tremendous amount of data obtained concerning the effect of the bombs upon ships and material. The geologists reported that, although the Baker Test had stirred up the bottom of the lagoon to distances of 1, to 1, yards, the maximum disturbance was limited to radius of some yards. Laboratories for chemical analysis and photograph processing were constructed. But the second bomb threw large masses of highly radioactive water onto the decks and into the hulls of vessels. Roberson, physicist, Clinton Laboratories, Oak Ridge, radiophysics. Submarines proved to be useful "instruments" for subjection to the enormous pressures created by the atomic bombs, since their hulls are expressly designed to withstand high pressures produced by the ocean at great depths of submergence, and by exploding depth charges and mines.
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Some forty-eight boat days were fished at Bikini and twenty-three at Rongerik. Looking on are Captain A. Hiatt was studying reef and lagoon fishes to determine the food chains represented on Bikini reefs. There were 37 nurses in the Task Forces. Others remained there to do necessary post-test "mopping up". Black stripes on a gaudy yellow base aided recognition by the conning aircraft.
A moment later it reached the palm trees at the edge of the water. Fish and Wildlife Service, reef and lagoon fishes; O. Intense and lasting radioactivity was produced in the water of the Lagoon. Surveys of the Bikini Lagoon were made, its waters combed for truant Japanese mines, its natives evacuated to another island. White rats were placed in various sites from the engine room to halyards to check all locations.
Such filters were put to especially good use at Bikini, and are in large part responsible for the excellent contrast obtained, particularly in photographs taken from the air. The sinking of Old "Sara" was watched with mixed emotions by members of the Task Force, many of whom had served on her during her fighting days. Manned planes had to stay miles away from this seemingly innocent cloud, the radioactivity of which was roughly equivalent to what would exist in the vicinity of tons of radium. There undoubtedly was, however, a difference in the group's interest in Bikini as a field laboratory. Similar in purpose to the pendulum-type inclinometer is this gyroscopic instrument. As is well known to photographers, use of yellow, orange, or red filters cuts down the amount of blue and ultraviolet light reaching the film, thus cutting out haze and leaving a dark background of sea and sky.