6. Some contamination will stisk te the sides and bottons depending upon the condition of cleanliness, mith clean vessels picking Up very little in this annor, An effort to nave ships report for tne eperation as clean as possible would help here, Also the best possibla -dry_dock side and bottom paint work would be @ great hatp. h. Some contamination will reain behind in the evaporators, although some of this should be flushed through. This source of contamt. nation could be reduced by aking water outside the Ligoon. No ippresiable amount of contamination should come through the ovaporator to the fresh water side, i. Tha relative costs of a mjor deconteaination oporation (several thousand dollare) should be weighed agninst the cost of a delay in the operation. also, tho value of opportunitios for suthentle fLeld teats of o ship's crew in decontamination operations ehould 53 consid~ ered. j. The Operstions Orders should spull out clearly a set of aore reclistis operational standards applying for atazis tests 18 opposed to those dosigned for routine operations. kind has been mde in Operations Order 1-53, kk. an ittacpt of this danp of the radiation standards published to date are particularily cver-cauticus, having large factors of safety built-in. This was partieulariy true of standards for ship operations during CROSSROADS, some of which were carried to such extremes as tc cause costly delays or extrezely difficult and cumbersome aethoda for getting the job done. Since that tins, the realities of the situation have Secome more and sore apparent and efforts have been mide to facd indoce trination treining inte cporational mthods. The fact remains, however, (ae evidenced an IVY) that operational commanders and staffs sre axtrene ly hesitant to proceed with assurance in such matters. This is perfect=- ly understandable in vicw of the fset that the radiological defense fiel is relatively young and since many rediation standards and asscciatod predicted effects have yet to be sorted into their real values or relationships. Mach of the letter has bem done; however, considerable im provement eould be ands toward injecting this kmowledge into operational probleme. It is bulicved that indcotrination as proposed bolow could gO a long way toward paving the way for @ sapoth cporation through a more realistie approach to tne true nature of the operational nuisance expested to exist in the Bikini lagoon. & Ia view of thu primary depundenec of thy Blidni shots on watar transportation, it is prepossd to hold &@ conferencs with CTC 7.3, ris Chdef of Staff, Operations Officer and Radiological Defense Staff as secon as possible aftcr thusa people can be assenbicd. This confurcnee would be esllad for tho exprese purpose of acquainting CTG 7.3 and his staff with tha realities of the nealth hazards facing a commander cperating in econtaginatod watore, together with portinent adainistrative and logistic implications arieing from such oporations, The Naval porsonnul indisated in parsgraph 1 above rvpreeant the policy-mxars lL