~7Beginning about June 10, a fast U.S. Navy vessel will work westward from the test site, making sweeps between 10 and 14 degrees North latitude west as far as fallout radioactivity can be detected. Continuous readings of radioactivity in the surface water will be taken by means of a device which pumps water around a detection instrument in a tank on the deck of the ship. The ship will stop each 25 miles to take sam- ples of the water at the surface and at depths of 25, 50, 75 and below 100 meters. Personnel aboard the ship also will make tows for plankton -— tiny marine organisms which tend to concentrate radioactive materials in their tissues. Fish will be caught, and analyzed for radioactivity. After the series, when test radioactivity wili have moved further away from the test site, a similar survey will be carried out as far west as radioactivity can be detected. The Commission also has entered into a contract with the George Vanderbilt Foundation at Stanford Univer— sity, under which scientists will collect samples of water, plankton, marine invertebrates and fish in the vicinity of the Palau Islands. These samples will be sent to the biological laboratory at the Hanford Engineer Works for analyses. (more)