UNCLASSIFIED a [> On the fifth day after the test, a guard of two monitors each morning and afternoon was set up on the test island, and the Beach Radsafe Center established. This made the island more accessible to the engineers who were to work on the portion where the intensity of radiation was now below tolerance limits. It considerably reduced the monitor demand on Task Group 7.6, and at the same time insured a closer watch on the many parties that had mission on the test island, The bogged tank was recovered from the crater, and work was befun by the engineers to destroy the remains of the test structures on the island in order to prevent any unauthorized persons from obtaining any information on the effects of the tests. On X-RAY~plus 9 the USS BAIRCKO shifted its anchorage to a location off the test island for YOKE Day, and final preparations for YOKE test were well underway, Two days later the island of X-RAY test was closed to all personnel, Preparation far YOKE Test Installation of stakes, and the painting of numbers on various structures of the test island facilitated island surveys. Three stakes at hundred yard intervals were placed on the island immediately to the north of the zero point for use in any surveys that micht be made in this direction. The stakes on the test islands were not located on a systematic radial manner from the zero point as was the case in test X-RAY, because the engineer structures were located in a cleared strip extending along the lagoon side of the islands and about 300 yards wide, It was planned to ignore, for all practical purposes, the extensive palm grove on the portion of the island toward the ocean, and which was expected to become a mass of tangled rubble as a result of the test, All of the island survey monitors were throughly briefed. Because of the evidence of fall-out from the X-RAY test, it was decided by higher authority to maintain monitors on the destroyer patrols until YOKE-plus 4. Accordingly a monitor was assigned to each of following destroyers: USS TUCKER (DDR 875) USS SPANGLER ( DE 696) USS GEORGE (DE 697) YOKE Day A huge cloud resulting fram the explosion of the atomic weapon was still plainly evident thousands of feet above the cero island when the four helicopters came in on the southern tip of the island for a landings. The landing was made about twenty minutes after H hour. l&jor Cook ina jeep with Dr. Orle and Mir. Linnenberger went along the land cable to assist in recovering the samples at various points alon; it. Major Sheppard