1, General Situation 1.1 General Same as in basic plan, 1.2 Nature and Scope of Test This test is to supply information which will permit determination of the effectiveness of a washdown system in reducing factors which may affect the gamma radiation hazard to shipboard personnel. On Transit ABLE this system will be installed on surfaces and configuretions typical of several types of Naval vessels. Transit BAKER, which has no washdown system, will have the same surfaces and configurations as Transit ABLE and will be used as the basis for comparison. dotm effectiveness vill be determined by comparing: VWash- (1) the integrated gamma radiation dose; (2) the gamma radiation field attributable to surface contamination at various times and at comparable locations on the two ships, Additional determinations of relative washdown effectiveness will be made for various surface materials and juxtapositions by comparing relative contamination levels as measured by beta surveying instruments, Corre~lation of the achieved effectiveness vith ship's operational information such as relative tind velocity, the washdowm supply and drainage waterflot:, etc., will be made when required, Shot participation is as ststed in the basic plan, 1.3 Purpose of Annex 1.3.1 To describe in detail the experimental objectives end plen of eatteck on Problem 6.4, “ST, LOUIS FRC 1.3.2 To provide detailed information on the operational ond logistical requirements of Problem 6.4a, 1.4 Enemy Forees (Shot Schedule) Same cs in basic plan. 1.5 Friendly Forces 1.5.1 Samo as in basic plen. SY