Operation Castle, Project 3.2, Crater Survey (Deleted)

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Headquarters Field qqmmand Armed Forces Speci# Weapons remains classified SECRET - FORMERLY RESTRICTED DATA $1 as of this date. Extract version prepared for: DEFENSE NUCLEAR AGENCY

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. REPORT UUKeER 2. GOVT ACCESSION MO Operation Castle, Project 3.2, Crater Survey Sandia Base, Albuquerque, New Mexico Approved for public release; unlimited distribution. S. TYPE OF REPORT & PER100 COVERED 6. PERFORMING ORG. RLPORT NUMBER 10. PROGRAU ELEktEnT. PROJECT. TASU II. SECURITY CLASS. (01 fhla repor This report has had the classified information r#n@'ed and has been republished in unclassified form for public release. This workwas performed by Kaman Tempo under contract DNAOOl-79-C-0455 with the close c&eration of the Classification Management Division of the Defense Nuclear Agency. ["i Fathometermeasurements of CASTLE Shots 1, 3, and 4 were made to assist!in the prefiction of craters produced by megaton weapons. The Shot 1 crater c&@d have been wedicted satisfactorily from the IVY Mike Shot. Shot 3 crater was smaller than jredicted on that basis. Both craters were larger than predictions based on simple scaling of the JANGLE surface shot, even if some allowance is made for the different DO I:::?, 1473 EDITION OF 1 NOV 6) IS ObSOLLTE UNCLASSIFIED

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This report has had classified material removed in order to nr~kqthe information available on an unclassified, open &blication basis, to any interested parties. This effort to Mgclassify this report has been accomplished specifically to supSport_the Department of Defense Nuclear Test Personnel Review (NTPRj_Prbgram. The objective is to facilitate studies of the low let&b of radiation received by some individuals during the atmos~~~~ic_,nucleartest program by making as much information as possibl,+&ailable to all interested parties. The m&&ial which has been deleted is all currently classified as Re-stricted Data or Formerly Restricted Data under the provision of the Atomic Energy Act of 1954, (as amended) or is National Security Information. This report-has b&n reproduced directly from available copies of the origina$material. The locations from which material has been deleted is generally obvious by the spacings and "holes' in the text." Thus the context of the material deleted is identified to &gist the reader in the determination of whether the deleted inf@n@ion is germane to his study. It is the belief of the in$$duals who have participated in preparing this report by deXet'i;ngthe classified material and of the Defense Nuclear Age&c$jthat the report accurately portrays the contents of the originafljandthat the deleted material is of little or no significance to studies into the amounts or types of radiation receivbb by any individuals during the atmospheric nuclear test progrpm,i .A

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GENERAL SHOT INFORMATION :8ikini, on Borgc 01 Intersectron Bog (Yurochi) and 3 Statute Miles from fox ( Aomoen). Emwetok, IVY Mke

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Q&$4 1, 3, and 4 vere made to arrlcltIn the predIction of craters p$&&cd by megaton weagone. !CheShot 1 crater could~_$ve been predicted uatlefactorlly from The shot 4 crater,produced!@)a shot on the surface of water having nel underneath It would probably have n breached but no hazard to navigation vas produced. g i An extrapolation procedure based &k smaller TNTexploeioas permits the prediction of the radius of the crater &&iuced by a nuclear exploslon under a WI& rarqe of circumstances. *r r8nge of uncertainty ia believed to be luger than a factor of two:[__,~

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p&g&d without extensive support both in the forward area and in the preparatg$q>stage on the continent. The generow and effective aeeietante oi )#6d the military and Atomic Energy CoPmission orgaaizatioas is In ~%&"@mnl~@ and preparation stage, personnel of the Office of gestlonsand’-*ements for many pieces of borrowed equipmmt. Thm~& reeling and measure equipment and swplled the wire. The Navy Electron&s Laboratory:s$SanDiegosupplieda fathomter and was of great help in re-reeling‘-thi wlrc and supplying a generator panel, the need for vhich was discovered~- y&r-y late in the preparations. Aeronauticsgenerously&a?# Raydistequipmentwhich proved to be of conalderablaaid in the hydro@@h survey involved in this project. The ful Ingivingadvice, loaning t, and amieting in computation. The aselstanceof the ArnrsdFort cial Weapons Project(AFSWP) mde available the trailer which the mqjor elcprnts 0s the equipJect, performedall the photogrwtry w providedmuch assistanceboth in the pluming and the executionof the"proj@+ The aerialphotogmphy was performedby @* Lmkout MountainLaboratoriee whose personnelwere helpfuland coop$$tlve at aU. times. I(. Gordon, Chief Quartermaster. The attitudeand Rrfonnmce of the wholecrewwas one of participation rather than mej?y service. The assistance of Holmes and Rawer, Inc., tht igeneral contractors, was excellent at all time. particularacknowled#nt +-q::+deto the surveygroup in that organizationunder Mr. Martin Cum&who provided the lead line soundingsincludedFn the reporteddata. i T-_‘,. Seestrom of the Army Map Service. 1 f ;