was asde to aszist this Project in the successful accamplinshnsnt of ite misaion, It was coneidered the most vital of those aponsored by the Department of Defense, 23. An interesting developaent involving this Project was the discovery by buoy hunting ships as the operation progressed that sharply defined pattarns of low level radioactive contasination existed in the cosan area fer downwind efter a shot, in the water iteelf. On the NECTAR shot, with all their fallout buoys expended, persomel of this Project assisted AEC Health anf Sefety Laboratory personnel in a stoty of the phenomenon, with the aid of SIOUX, NOLALA exci VP-29 aircraft, mnitoring exi plotting the conteninsted areas eni obtaining water somples for andlyals. Exosoch Zhe The Havy Buresa of Orinanes had obtained ‘approval late in the CASTLE planning period for inclusion of a prograa to test the neutralising effect of high yield detonstions on naval mines, - ProSect 3.4. The chips SHEA, a light minelayers RSCLAIER ao salvage vessels and LST 1157, with tao Lie from Naval Besch Croup Cie, ani Explosive Ordnance Disposal Usit One were assigned to the task group specifically to support the Project. Arriving lete in the Operation, the project perticipated in only one shot, UIICN, The initial intention was to make @ preliminary test by planting « few ainea on one shot with the main effort on « later one. Uncertainty over the shot schedule led to the deciaionte dispense with the initial test, ani on UNION the HE