1.6.7 The line along which the ships travel during the time they are being contaminated represents only a small fraction of the contaminated area of military interest. Data from the tests will therefore be directly applicable to the unique set of conditions existing along the line of travel during the cantaminating event. Use of this data to describe countermeasure effectiveness in other areas of military interest will thus be necessarily limited by the lack of knowledge as to how the variation of contaminating conditions would affect countermeasures. A close working relationship with Projects 2.5a and 2.6a has been set up to mitigate this problem. 1.6.8 Estimations for combat ships on the basis of results obtained on the Liberty ships will be limited by differences between the two types with respect to construction and operating speeds. Construction will affect drainage and thus affect decontamination. Construction differences will also affect shielding measurements. Differences in operating speeds may affect the effectiveness of the washdown system. ‘fodifications have been made on the TRA.ISIT ships to simulate combat vessel construction. Wash- down delivery conditions will be measured to assist in extrapolation. 1.6.9 The usefulness of some countermeasure data will be limited when used to estimate effectivenesses at earlier times than when data was collected. During the period before the ships can be reboarded and studies undertaken, changes in the initial conditions will occur from redistribution of contaminant by weather, from changes in the nature of bonds between surfaces and contaminant, and from changes in energy of radiation due to radioactive decay. 2. MISSION To proof-test existing and proposed radiologioal countermeasures for naval ships and aircraft (not in flight) against surface and subsurface -atomic attack; to gain sufficient basic knowledge of the radiological situation on ships andaircraft (not in flight) to permit proper counter- measure development; and to gain such information for harbor targets as is appropriate within test conditions and without jeopardizing the primary objectives of the mission. 5. TASKS OF SUBORDINATE UNITS Sel Organization 3.1.1 Annex J illustrates the Organization of Project 664 and includes personnel listings, both alphabetically and by sub-project. 3.2 Project Officer ST, dd LOVIS FRC be 5.2.1 The Project Officer 6.4, is designated by the Chief, Bureau of Ships and ordered to report to Commander, Task Group 7.1 through 009521 ed /38