gun cna Project 2.62 - Fallout Studies by Oceanography Methods ~ F.D, Jennings OBJECTIVES To understand the oceanography of the ocean area where fallout is expected in order to extrapolate the observed fallout pattern back to the equivalent land pattern. To furnish oceanographic assistance to the Task Force. To measure the fallout radioactivity and its chemical nature in the water from a high air burst, a surface land burst, and surface water bursts. To calculate the equivalent land fallout pattern. To understand the nature of the transport and dilution of radio- 4 active fallout material in the ocean to permit future surveys to : acquire a complete fallout picture from the least possible measurements. To understand the oceanography of Bikini lagoon as it involves the circulation of contaminated waters, particularly the effluent thereof and the occurrence of rapid transients of circulation which may result in sudden redistribution of activity. DESCRIPTION AND EXPERIMENTAL PROCEDURE The Bikini lagoon was investigated using an instrumented trailer aboard a Navy ICU. The project installed and maintained sixteen deep—moored skiff Stations in the fallout area between 10 and 30 miles from ground zero. Recording instruments were installed on these skiffs to measure the radioactivity as a function of time at depth intervals of 20 meters down to 100 meters. A time of arrival starting pulse was supplied by Project COMEDN/DOE F LAnL RO -31- > 2.63.