156° OO' E. 18° 30' N., 18° 30! N., 11° 30' N., 170° 0O' E. 170° OO' E. 11° 30' N., 166° 16! E. 10° 15' N., 166° 16' E. 10° 15! N., 156° OO' E, Notices have been given the widest possible distribution through marine, aviation and international organizations. Regular air and sea searches of the area will be condueBefore each shot, the ted in advance of the start of operaticns. patrol of the danger area will be intensified, particularly in the area where fallout is forecast. The Atomic Energy Commission has issued regulations which prohibit entry into the danger area of U. S. citizens and all other persons subject to the jursidiction of the United States, its territories and rossessions. The regulations effective from April 11, 1958 until the HARDTACK test series 1s completed prohibit entry, attempted entry or conspiracy to enter the danger area. Radiation Monitoring in Proving Ground Region Radiological safety personnel, equipped with radiation detection and measuring instruments and two-way radios to enable them to communicate with the central Task Force Radiological Safety Office, will be stationed on nearby inhabited atolls, and at weather stations of the weather reporting network. In the unlike- ly event of significant fallout in an inhadited area, the monitors would warn the inhabitants and advise and assist them in taking Safety measures. The monitors also have trained Marshallese medical practitioners and health aides in basic emergency measures. Radiation Surveys of Sea and Marine Life Outside of the testing area, the detonations are not ex- pected to add enough radioactive material to natural levels of vadloactivity in the ocean to be harmful to marine life. Experi2nee Shows that outside the testing area, resulting quantities of Sadloactivity in edible sea foods will result in exposures which will be very small compared with the limits for public exposure “ecommended by the United States National “rotection and Measurement. Committee for Radiation As in the past there will be a program of study to exslore the ultimate destination and behavior of radioactivity in the s¢a water and in marine organisms. Sweeps by U.S. Navy Vessels 9th during and after the test series will include such measures 28 sSeaking continuous readings of radioactivity in surface water, (more)