FIGURES 2.1 Internal configuration of towed gamma detector, Mark I ---~-------2.2 Mark I calibration from distant point source of radium, Site Elmer Rad-Safe compound, 10 May 1954 ---------~-- t~--~ 2.3 Mark II calibrations ~~ -~--- 3+ tr rrr te rem er rr rrr 2.4 Mark II calibration from distant point source of radium, 2.5 2.6 3.1 3.2 20 21 Site Elmer Rad~Safe compound, 10 May 1954 ~--~-------------~ Response of Mark I prior to 1900 hours on 8 May 1954 -------------Ship’s track, Shot 5 survey ~---3rro rt rr ree ee rere Mark I, Il, I, towed detector data, Shot 5 ----~---------------- 22 23 24 28 Grift ~- mr rr rt rr rrr re cen 30 “Pot” record in mr/hr showing correction for accumulated , 3.3 Relative radiation intensity along ship’s track, Shot 5 BUYVEY tr rr cca 3.4 Mark II vertical radioactivity profiles, Shot 5-- -----------------3.5 Progress of vertical mixing ---- - >on 3.6 Decay of coefficient curve ~-- --- tort tt rr tr rer tren 3.7 Accumulated dose factor -------- rr rr rr rr rt re rrr rere 3.8 Estimated time of arrival of fallout from an analysis of the winds for Shot 5 -- -- --- ro ro rrr tr rr rr re rr ere nn 3.9 Ocean current vectors from Japanese hydrographic investigations, 19388-1941 ---- rte tm mr rr rrr rrr rrr ree 8.10 Ocean current buoy drift data, October-November 1952 and 31 36 36 37 37 47 47 February~April 1954 ---~---------------------------- 48 49 Shot §- - rrr rm rr rrr rr rc re sen 50 58 61 62 3.11 Iso-intensity contours for Shot 5 -----~----------- n-ne 3.12 Total dose from time of fallout to H + 50 hours in roentgens, Calculated decay (d/m) for Shot 6 fallout ~--~-----ccr erence crn nn Depth of penetration of Shot 5 fallout in ocean water --~~-----------Estimated times of arrival of fallout --------- erm ee eo nnn Relative response of NRDL ion chamber with incident photon energy (Mev) (after Shelbert) -~------------crrr ene 4.5 Calculated decay (d/m) for Shot 5 fallout -------------------~--4.6 Estimated fallout dose rate contours for Shot 6 at H + 12 hours 4.1 4.2 4.3 4.4 A.l Bl B.2 B.3 19 (p/hr) wort rrr rr rrr rrr crc nce Location of instruments during Shot 5 ~------- rrr ttt rrr occ Histograms of estimated source spectra ~~---- 7c tt ratte ttre Histograms of degraded dose spectra ~-~-- -- mrt tre ret rrr reer Experimental response of Mark II for rays at 90 degrees incidence ~ mrt ttt rr rr ens ean B.4 Variation in response of Mark II with angle of incidence of radiation ~ - ---- ------- 97-3 eee rrr rr rrr rn B.5 Plot of data from Table B.4----------------- ere rrnrenr C1 Schematic of reduction of readings to dose rate (mr/hr) at 3 feet elevation ~v-- ttt tt rrr rrr trae 67 69 74 79 82 84 85 85 85 TABLES 3.1 Second Vertical G. M. C. Profile in Yankee Fallout -----~-------~--3.2 Third Vertical G. M. C. Profile in Yankee Fallout ---~-------~---- 13 33 33