(FLATHEAD Project 2.9 - Standabi Recovery Procedure for Tactical Decontamination of Ships - F, 3. Vine OBJECTIVES To proof test a ship decontamination procedure consisting of firehosing, haniscrubting with detergent, and a second firehosing, in that order. To perform an operaticnal decontamination of the YAG 39, YAG 40, and LST 611, as required, to permit participation of these ships in other scheduled shots. 'f. TROCEDUZE The YAGs and LST were positionei in the expected fallout area, as ietermined by Project 2.63, and served as test platforms for that project. Upon completion of their missions the ships returned to No decontamination of the LST-611 was performed because of the negligible contamination received by that ship. The YAGs 39 and 40 were djetontaminated simultaneously on F ¢ 3, RESULTS Freof testing of decontamination, as planned eboard the YAG-39, could not te accomplished teesuse of the extremely low initial radiiation levels. On the YAG-40 the average initial level in the non-washiown area forward of the superstructure (exclusive of the flizht deck) was 19 mr/hr., By the previously deseribed decontamination procedures this was reluced to 5.5 mr/hr, an effectiveness of 67 percent when corrected for decay, pe a 2 Ww re - 37 - uy