DNA-TR-82-05-V2 

ANALYSIS OF RADIATION EXPOSURE FOR 

NAVAL UNITS OF OPERATION CROSSROADS 

Volume II-(Appendix A) Target Ships 

Science Applications, Inc. 

P.O. Box 1303 

McLean, VA 22101-1303 

3 March 1982 

Technical Report 

CONTRACT No. DNA 001-82-C-0012 

THIS WORK WAS SPONSORED THE DEFENSE NUCLEAR AGENCY 

UNDER RMSS CODE 8384082466 

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1. REPORT NUMBER 2. COVT ACCESSION NO. RECIPIENT’S 

DNA-TR-82-05-V2 I I 

TYPE OF A PE RIOD CO V E R E D 

ANALYSIS OF RADIATION EXPOSURE FOR NAVAL 

UNITS OF OPERATION CROSSROADS 

Volume (Appendix A) Target Ships 

7. AUTHOR(m) CONTRACT OR GRANT NUMBER(a)

C. Thomas J. Klemm 

J. Stuart M. Knowles Goetz DNA 001-82-C-0012 

E. A. Landay 

10. PROGRAM ELEMENT. PROJECT. TASK 

AREA A WORK UNIT NUMBERS PERFORMING ORGANIZATION NAME AND ADDRESS 

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IS. STATEMENT (of Report) 

Distribution limited to US Government Agencies only; Test and Evaluation, 

25 May 1983. Other requests for this document must be referred to the 

Director, Defense Nuclear Agency, Washington, DC 20305. 

DISTRIBUTION STATEMENT (of Block 20, If from 

NOTES 

This work was sponsored by the Defense Nuclear Agency under Code 

B384082466 

KEY WORDS • Ida md identify by block 

Operation CROSSROADS Nuclear Test Review (NTPR) 

Joint Task Force One Ship Contamination 

Oceanic Nuclear Test 

Radiation Exposure Assessment 

External radiation doses are reconstructed for crews of support and target 

ships of Joint Task Force One at Operation CROSSROADS, 1946. Volume I 

describes the reconstruction methodology, which consists of modeling the 

radiation environment, to include the radioactivity of lagoon water, target 

ships, and support ship contamination; retracing ship paths through this 

environment; and calculating the doses to shipboard personnel. The USS 

RECLAIMER, a support ship, is selected as a representative ship to demonstrate 

OF WOV IS UNCLASSIFIED 

SECURITY OF PAGE 
 

_-CLASSIFIED 

Of 

I 

20. ABSTRACT (Continued)' 

this methodology. Doses for all other ships are summarized. Volume II 

(Appendix A) details the results for target ship personnel. Volume III 

(Appendix details the results for support ship personnel. Calculated 

doses for more than 36,000 personnel aboard support ships while at Bikini 

range from zero to 1.7 rem. Of those, approximately 34,000 are less than 

0.5 rem. From the models provided, doses due to target ship reboarding 

and doses accrued after departure from Bikini can be calculated, based on 

the individual circumstances of exposure, 

UNCLASSIFIED 

CLASSIFICATION Of 
ANALYSIS OF RADIATION EXPOSURES FOR 

NAVAL UNITS OF OPERATION CROSSROADS 

VOLUME II 

APPENDIX A: TARGET SHIPS 

TABLE OF CONTENTS 

SECTION PAGE 

A-l INTRODUCTION 5 

A-2 NON-REMANNEDTARGET SHIP PARTICIPATION SUMMARIES 7 

USS ANDERSON 8 

APOGON 9 

USS ARDC-13 IO 

USS ARKANSAS 12 

USS BANNER (APA-60) 14 

USS RARROW 16 

USS BRACKEN (APA-64) 18 

USS BRISCOE (APA-65) 20 

USS (APA-66) 22 

USS BUTTE 24 

USS CARLISLE (APA-69) 26 

USS 28 

USS 30 

USS CRITTENDEN 32 

USS DAWSON (APA-79) 34 

USS (APA-81) 36 

USS CASCONADE (APA-85) 38 

USS (APA-57) 40 

USS HUGHES 42 

USS INDEPENDENCE 44 

USSLAMSON 46 

USSLCI-327 48 

USS LCI-332 50 

USS LCI-620 52 

USS LSM-60 53 

USSLST-52 54 

USSLST-125 56 

USSLST-133 

USS LST-220 60 

USSLST-545 62 

USSLST-661 64 

USS 66 

USS 68 

USS 70 

72 

NEVADA 74 

USS NEW YORK 76 

USS PENNSYLVANIA (RR-38) 7s 

1 
 

 

 

TABLE OF CONTENTS (Continued) 

SECTION PAGE 

A-2 USS PENSACOLA (CA-24) 80 

PILOTFISH (SS-386) 82 

EUGEN CA) 84 

USS RALPH 86 

USS RHIND 88 

SAKAWA 90 

JSS SALT LAKE CITY (CA-25) 92 

SARATOGA 94 

SKATE 96 

USS SKIP JACK 184) 98 

USS STACK 100 

102 

UFS ‘S’AIN‘VRICYT 19) 104 

USS WILSON 106 

YO-160 108 

YOG-83 110 

LCT-4 12 112 

JSS LCT-4 14 113 

l-CT-705 114 

LCT-746 

LCT-8 12 117 

LCT-8 16 118 

USS LCT-8 18 120 

LCT-874 122 

LCT-1013 124 

USS LCT-1078 126 

LCT- 11 128 

13 130 

USS LCT-1114 132 

USS LCT-1115 133 

USS LCT-I 175 134 

UCS LCT- I 135 

USS LCT- 1237 136 

A-3 REMANNED PARTICIPATION 137 

USS BLADEN 138 

CONYNGHAM 142 

USS 144 

148 

150 

GENEVA 153 

USS 156 

158 

160 

USS NIAGARA 163 

PARCHE (SF-384) 166 

(SC-196) 168 

170 

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LIST OF ILLUSTRATIONS 

FIGURE PAGE 

NON-REMANNED SHIP GAMMA INTENSITY CURVES 

A-l 

A-2 

A-3 

A-4 

A-5 

A-6 

A-7 

A-8 

A-9 

A-10 

A-11 

A-12 

A-13 

A-14 

A-15 

A-16 

A-17 

A-18 

A-19 

A-20 

A-21 

A-22 

A-23 

A-24 

A-25 

A-26 

A-27 

A-28 

A-29 

A-30 

A-31 

A-32 

A-33 

A-34 

A-35 

A-36 

A-37 

A-38 

A-39 

A-40 

A-41 

A-42 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time

Shipboard Gamma Intensity vs. Time USS BUTTE, (APA-68) 25 

Shipboard Gamma Intensity vs. Time USS 29 

Shipboard Gamma Intensity vs. Time USS 31 

Shipboard Gamma Intensity vs. Time USS CRITTENDEN 33 

Shipboard Gamma Intensity vs. Time DAWSON (APA-79) 35 

Shipboard Gamma Intensity vs. Time USS 37 

Shipboard Gamma Intensity vs. Time USS GASCONADE 39 

Shipboard Gamma Intensity vs. Time IJSS HUGHES (DD-410) 43 

Shipboard Gamma Intensity vs. Time USS INDEPENDENCE 45 

Shipboard Gamma Intensity vs. Time USS LCI-327 49 

Shipboard Gamma Intensity vs. Time USS LCI-332 51 

Shipboard Gamma Intensity vs. Time LST-52 55 

Shipboard Gamma Intensity vs. Time USS LST-133 59 

Shipboard Gamma Intensity vs. Time USS LST-220 61 

Shipboard Gamma Intensity vs. Time USS LST-545 63 

Shipboard Gamma Intensity vs. Time USS LST-661 65 

Shipboard Gamma Intensity vs. Time USS 67 

Shipboard Gamma Intensity vs. Time USS 69 

Shipboard Gamma Intensity vs. Time USS 71 

Shipboard Gamma Intensity vs. Time NAGATO 73 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity VS. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

Shipboard Gamma Intensity vs. Time 

USS ARDC- 13 11 

BANNER (APA-60) 15

 USS BARROW (APA-61) 1 7

 USS BRACKEN 1 9

 USS BRISCOE (APA-65) 21 

(APA-66) 23 

Shipboard Gamma Intensity vs. Time USS TRIPPE 103 

Shipboard Gamma Intensity vs. Time WAINWRIGHT (DD-419) 105 

Shipboard Gamma Intensity vs. Time USS WILSON 107 

Shipboard Gamma Intensity vs. Time USS YOG-83 111 

Shipboard Gamma Intensity vs. Time USS LCT-705 115 

USS NEVADA 7 5

 USS NEW YORK 77 

USS PENNSYLVANIA 7 9

 USS PENSACOLA 81 

EUGEN 

USS RALPH TALBOT 8 7

 USS RHIND 8 9

 USS SALT LAKE CITY (CA-251 9 3

 USS SKATE 9 7

 USS SKIPJACK (SS-184) 99 

STACK 101 
 

 

 

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LIST OF ILLUSTRATIONS (Concluded) 

FIGURE PAGE 

A-43 

127 

Shipboard Gamma Intensity vs. Time USS LCT-816 119 

A-44 Shipboard Gamma Intensity vs. Time USS LCT-818 121 

A-45 Shipboard Gamma Intensity vs. Time USS LCT-874 123 

A-46 Shipboard Gamma Intensity vs. Time LCT-1013 125 

A-47 Shipboard Gamma Intensity vs. Time USS LCT-1078 

A-48 Shipboard Gamma Intensity vs. Time USS 129 

A-49 Shipboard Gamma Intensity vs. Time USS LCT-1113 131 

REMANNED TARGET SHIP GAMMA INTENSITY CURVES 

A-50 Shipboard Gamma Intensity vs. Time USS CONYNGHAM 143 

A-51 Shipboard Gamma Intensity vs. Time USS DENTUDA 149 

A-52 Shipboard Gamma Intensity vs. Time USS 157 

A-53 Shipboard Gamma Intensity vs. Time 159 

A-54 Shipboard Gamma Intensity vs. Time USS PARCHE 167 

A-55 Shipboard Gamma Intensity vs. Time 169 

A-56 Shipboard Gamma Intensity vs. Time USS TUNA 171 

A-57 Post Bikini Dose 172 

A-58 Shot ABLE Red Lines 173 

A-59 Shot ABLE Blue Lines 174 

A-60 Shot BAKER Red Lines 175 

A-61 Shot Blue Lines 176 

LIST OF TABLES 

TABLE PAGE 

A-l Calendar Date Conversions for Operation CROSSROADS 177 

4 
A- 1 INTRODUCTION 

Eighty-four (84) ships were designated as target ships in support of Operation 

CROSSROADS. With the exception of seventeen that were transported to 

Bikini and had no deck logs maintained on them, all of the target ships had been sailed 

to Bikini with a normal crew complement. The purpose of this appendix is to 

summarize the radiation dose history of the target ship crews while at Bikini and to 

provide the user with sufficient data to calculate personnel exposures subsequent to 

their departure from the lagoon. The final disposition of each target ship is also 

included. 

In the organization of Appendix A, the 84 target ships have been categorized as 

either being NON-REMANNED (includes or REMANNED and sailed 

away. There were seventy-one (71) target ships in the category, 

including the 17 that were tranported to the lagoon. Only thirteen of the 

target ships were REMANNED after Shot BAKER and sailed away. 

Crews of target ships were housed on personnel transports during and following 

the two detonations. The crews of ships that were subsequently sunk or rendered 

uninhabitable by Shot ABLE and/or BAKER continued living aboard transport ships. 

Generally, the crews of non-remanned target ships were disbanded (either at Bikini or 

Kwajalein) prior to their return to or CONIJS. In those instances when a crew 

was disbanded prior to its departure from Bikini Lagoon, the reconstruction dose is 

developed until the date the majority of the crew can no longer be identified as a 

discrete unit. In those instances when a crew was disbanded while at Kwajalein, the 

reconstructed dose is developed until the transport that housed the crews departed 

Bikini. 

Section A-2 of this appendix contains a Target Ship Participation Summary sheet 

and a Shipboard Gamma Intensity Curve (unless the vessel sunk as a result of Shot 

ABLE or BAKER) for each of the target ships. The curves are 

included to permit dose calculations for CQOSSROADS participants after they left 

Bikini. These data sheets are presented in alphabetical order by ship name with the 
exception of the which were unmanned at all times while at Rikini and have 

been treated as a subset of the NON-REMANNED ship category. Where radiological 

data and ship/crew locations are known for the this data is provided. 

Section A-3 contains similar data sheets for each of the thirteen remanned 

target ships that were sailed away after Shot RAKER. For six of these ships, the 

radiological data does not exist to reconstruct their shipboard intensity curves. In 

these cases, the curves have been replaced with the ship’s Path Report, which details 

the ship’s movements through areas of radiological significance while at Bikini, and a 

Radiological Report, which is a day-by-day compilation of the reconstructed film 

badge dose for the crew while aboard the ship until its departure from the lagoon. The 

Target Ship Participation Summary sheets for these six ships include a ship contamination factor when departing Bikini that should be used in conjunction with the 

nomograph in Figure A-57 to calculate crew exposures subsequent to their departure 

from 

these thirteen target ships were remanned and sailed away after 

Shot RAKER, it was necessary in some instances for the crews to periodically reboard 

the target vessels while at for decontamination work and to make general 

repairs to the ship. For the days when this occurred (as extracted from the ship’s deck 

logs), the average crewmember dose is calculated using: 

24-N D 

where average crewmember film badge dose 

N number of hours aboard the target ship (from deck logs) 

daily topside film badge dose on the target ship (derived from the 

ship’s gamma intensity curve or the radiological report) 

daily film badge dose on the evacuation ship (from III, 

APPENDIX of this report) 

6 
SECTION A-2 

NON-REMANNED TARGET SHIP 

PARTICIPATION SUMMARIES 
 

- -

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TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS ANDERSON 

CREW SIZE: 105 

MISSION: USS ANDERSON was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonation that 

occurred on July I, 1946. 

SHOT DATA: TEST DATE TIME) YIELD TYPE DETONATION 

ABLE July 46 (0900) 23 KT Air Burst ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June July Evacuated aboard 0.001 

(Observed Shot ABLE from a distance 

of 21 miles) 

BAKER 

9 July -23 August Evacuated aboard AJAX (AR-6)which departed 0.191 

Bikini on 23 August. 

(Observed shot Baker from a distance

of 15.5 miles) 

Total calculated dose while at Bikini: 0.192 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL ANDERSON sank in Bikini lagoon on July 1946 as a result of Shot 

ABLE. 

8 
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TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS APOGON 

CREW SIZE: 54 

MISSION: USS APOGON was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June 1 July Evacuated aboard BOTTINEAU 0.000 

(Observed Shot ABLE from a distance 

of 25 miles)

2 July-19 July Aboard APOGON 0.050 

BAKER 

20 July-7 August Evacuated aboard BOTTINEAU 0.143 

(Observed Shot BAKER from a 

distance of 16 miles)

8 August-17 August Aboard FILLMORE 0.055 

17 August Crew transferred to various units as 

II. 

Total calculated dose up until the date when the crew splintered: 0.248 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: APOCON sank in Bikini Lagoon on July 25, 1946 as a result of shot 

BAKER. 

9 
TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS ARDC-13 

CREW SIZE: 4 

MISSION: USS ARDC was a CROSSROADS target ship and arrived at Bikini prior to June 

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 

BAKER 25 July 46 

23 KT 

23 KT 

Air Burst 

Shallow (-90 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM ) 

Unknown 

FINAL DISPOSITION: ARDC-13 sank in Bikini lagoon on August 4, 1946 as a result of 

progressive flooding due to shot BAKER. 

10 
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10 SEPT 100 

USS ARDC-13 

0.1 

1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-l. Shipboard Gamma Intensity vs. Time USS ARDC-13 

11 
TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS ARKANSAS 

CREW SIZE: 441 

MISSION: USS ARKANSAS was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 

BAKER 25 July 46 

23 KT 

23 KT 

Air Burst ft) 

Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June- 8 July Evacuated aboard ROCKBRIDGE (APA-228) 0.009 

(Observed Shot ABLE from a distance 

of 21 miles) 

9 July-17 July Aboard ARKANSAS 0.015 

July Evacuated aboard ROCKBRIDGE 0.000 

19 July-23 July Aboard ARKANSAS 0.006 

BAKER 

24 July-6 August Evacuated aboard ROCKBRIDGE 0.148 

(Observed Shot BAKER from a distance 

of 16 miles) 

6 August Crew transferred to various units. 

Total calculated dose up until the date when the crew splintered: 0.178 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: ARKANSAS sank in Bikini lagoon on July 25, 1946 as a result of 

Shot BAKER. 
DATA NOT AVAILABLE TO RECONSTRUCT 

THE SHIPBOARD GAMMA INTENSITY CURVE 

13 
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TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS BANNER 

CREW SIZE: IO4 

MISSION: USS BANNER was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 23 Air Burst ft) 

BAKER 25 July 46 23 Shallow Underwater ft) 

AVERAGE CKEW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June 1 July Evacuated aboard BOTTINEAU (APA-235) 0.000 

(Observed Shot ABLE from a distance 

of 25 miles)

2 July -17 July Aboard BANNER 0.009 

18 July -19 July Evacuated aboard BOTTINEAU 0.000 

20 July -23 July Aboard BANNER 0.000 

BAKER 

24 July 7 August Evacauted aboard BOTTINEAU 0.143 

(Observed shot BAKER from a distance

of 16 miles) 

8 August-17 August Aboard BEXAR 0.098 

17 August Crew transferred to GEORGE CLYMER 164) 

BEXAR and others 

Total calculated dose up until the date when the crew splintered: 0.250 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: BANNER was towed to Kwajalein after CROSSROADS for 

radiological tests. It was retained there until it was scuttled off Kwajalein on February 16, 1948. 

14 
USS BANNER (APA-60) 

TOPSIDE 

AMIDSHIPS 

0.1 

SEPT 100 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in

sections 2.4 and 4.0 of the basic report. The data points and curve are 

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-2. Shipboard Gamma Intensity vs. Time BANNER (APA-60) 

15 
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TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS BARROW 

CREW SIZE: 114 

USS BARROW was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1944. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 23 KT Air Burst f 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June July Evacuated aboarad BEXAR 0.000 

(Observed Shot ABLE from a distance

of 22 miles) 

2 July -17 July Aboard BARROW 0.007 

July -19 July Evacuated aboard BEXAR 0.000 

20 July -23 July Aboard BARR0 W 0.000 

BAKER 

24 July -17 Evacuated aboard BEXAR 0.199 

(Observed Shot BAKER from a distance 

of 16 miles)

17 August Crew transferred to GEORGE CLYMER (71) 

and others (43). 

Total calculated dose up until the date when the crew splintered: 0.206 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live the ship. 

FINAL DISPOSITION: BARROW was towed to Kwajalein after CROSSROADS for 

radiological tests. remained there until May 11, 1948, when it was scuttled off 

Kwajalein. 

16 
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A BELOW DECKS 

A 

USS BARROW (APA-61) 

1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sornetimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-3. Shipboard Gamma Intensity vs. Time LJSS BARROW 

17 
 

 

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TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS BRACKEN (APA-64) 

CREW SIZE: 108 

USS BRACKEN was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July 1 and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst 

BAKER 25 July 46 23 KT Shallow I Jnderwater 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE CREW LOCATION FILM BADGE 

DOSE 

ABLE 

30 June 1 July Evacuated aboard HENRICO 0.000 

(Observed Shot ABLE from a distance 

of 12 miles) 

2 July -23 July Aboard BRACKEN 0.000 

24 July Crew transferred to 

and HALL. 

Total calculated dose up until the date when the crew splintered: REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: BRACKEN was towed to Kwajalein after CROSSROADS where it 

was retained for radiological test. It was sunk off Kwajalein on March 10, 1948. 

18 
USS BRACKEN (APA-64) 

0.1 

BELOW DECKS 

1 10 I SEPT 100 1000 

Days After BARER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-4. Shipboard Gamma Intensity vs. Time USS BRACKEN (APA-64) 

19 
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TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS BRISCOE 

CREW SIZE: 112 

[MISSION: BRISCOE was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July I and July 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 (0900) 23 KT Air Burst ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater (-90 ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 22 miles)

2 July -17 July Aboard BRISCOE 0.004 

18 July -19 July Evacuated aboard 0.000 

20 July -23 July Aboard BRISCOE 0.000 

BAKER 

24 July 2 August Evacuated aboard 0.062 

(Observed Shot BAKER from a distance 

of 15 miles)

3 August-17 August Aboard 0.136 

17 August Crew transferred to 

CORTLAND GENEVA and 

others. 

Total calculated dose up until the date when the crew splintered: 0.202 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: USS BRISCOE was towed to Kwajalein where it was retained for 

radiological study. It was scuttled off Kwajalein on May 6, 1948. 

20 
-

 BRISCOE (APA-65) 

0.1 

1 10 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-5. Shipboard Gamma Intensity vs. Time LJSS BRISCOE (APA-65) 

21 
 

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS BRULE 

CREW SIZE: 

MISSION: USS BRULE was a CROSSROADS target ship and arrived at Bikini prior to June

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 (0900) 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater (-90 f t) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June 2 July Evacuated aboard BEXAR 0.004 

(Observed Shot ABLE from a distance 

of 22 miles)

3 July -17 July Aboard BRULE 0.004 

18 July -19 July Evacuated aboard BEXAR 0.000 

20 July -23 July Aboard BRULE 0.000 

BAKER 

24 July -19 August Evacuated aboard BEXAR 0.209 

(Observed Shot BAKER from a distance

of 16 miles)

19 August Crew transferred to NIAGARA 

BEXAR GENEVA and others. 

Total calculated dose up until the date when the crew splintered: 0.217 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: BRULE was towed to Kwajalein after CROSSROADS for 

radiological tests. It was retained there until 11, 1948 when it was scuttled off 

Kwajalein at 
USS BRULE (APA-66) 

READ RIGHT 

A BELOW DECKS 

1 100 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are

presented as a function of time in days after Shot Baker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-6. Shipboard Gamma Intensity vs. Time USS BRULE 

23 
 

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS BUTTE 

CREW SIZE: 126 

MISSION: BUTTE was a CROSSROADS target ship and arrived at Bikini prior to June

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July 1 and July 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June 2 July Evacuated aboard BEXAR 0.004 

(Observed Shot ABLE from a distances 

of 22 miles)

3 July -17 July Aboard BUTTE 0.000 

18 July -19 July Evacuated aboard BEXAR 0.000 

20 July -23 July Aboard BUTTE 0.000 

BAKER 

24 July -17 August Evacuated aboard BEXAR 0.199 

(Observed Shot BAKER from a distance 

of 16 miles) 

17 August Crew transferred to GEORGE CLYMER 

BEXAR and others. 

Total calculated dose up until the date when the crew splintered: 0.203 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: BUTTE was towed to Kwajalein after CROSSROADS where it was 

retained for radiological tests. It was scuttled off Kwajalein at on 

12, 1948. 

24 
-

USS BUTTE (APA-68) 

0.1 

1 100 1000 

Days After BAKER 

I 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-7. Shipboard Gamma Intensity vs. Time USS BUTTE 

25 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: CARLISLE (APA-69) 

CREW SIZE: 104 

MISSION: USS CARLISLE was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonation that 

occurred on July 1, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION 

ABLE I July 46 23 KT Air Burst 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE CREW LOCATION FILM BADGE 

DOSE 

ABLE 

30 June 5 July Evacuated aboard BEXAR (APA-237) 0.005 

(Observed Shot ABLE from a distance 

of 22 miles)

5 July Crew transferred to various units. 

Total calculated dose up until the date when the crew splintered: 0.005 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: CARLISLE sank in Bikini lagoon on July 1, 1946 as a result of Shot 

ABLE. 

26 
DATA NOT AVAILABLE TO RECONSTRUCT 

THE SHIPBOARD GAMMA INTENSITY CURVE 

27 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS 

CREW SIZE: 119 

MISSION: USS was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION

ABLE July 46 23 KT Air Burst f 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June I July Evacuated aboard BEXAR 0.000 

(Observed Shot ABLE from a distance

of 22 miles) 

2 July -23 July Aboard 0.006 

BAKER 

24 July -19 August Evacuated aboard BEXAR 0.209 

(Observed Shot BAKER from a distance 

of 16 miles) 

20 August Crew aboard GEORGE CLYMER which 0.004 

departed Bikini on 20 August. 

Total calculated dose while at Bikini: 0.219 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: was towed to Kwajalein after CROSSROADS for 

radiological study. It was sunk by gunfire of the USS TOLEDO on April 19, 1948 at 
 

-

-

 70) 

A 

C 

1 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-8. Shipboard Gamma Intensity vs. Time USS 

29 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS CA T RON I) 

CREW SIZE: 1 6 

MISSION: USS was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater f t) 

AVERAGE CREW MEMBER DOSE HISTORY 

17 August 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

ABLE 

DOSE (REM) 

30 June July 

2 July -23 July 

Evacuated aboard HENRICO 

(Observed Shot ABLE from a distance 

of 12 miles) 

Aboard 

0.000 

0.003 

BAKER 

24 July -12 August 

13 August-17 August 

Evacuated aboard HENRICO 

(Observed Shot BAKER from a distance 

of 8 miles) 

Aboard ROCKINGHAM 

0.197 

0.038 

Crew transferred to GEORGE CLYMER 

rest to ROCKINGHAM (61). 

calculated dose up until the date when the crew splintered: 0.238 REM 

This reconstruction does not include time aboard the target ship for activities such as 

dam age control, decontamination or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: was towed to Kwajalein after CROSSROADS for 

tests. It was sunk by the USS ATLANTA on May 6, 1948 at . 

30 
 

USS (APA-71) 

0.1 

1 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-9. Shipboard Gamma Intensity vs. Time -- (APA-71) 

31 
 

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS CRITTENDEN 

CREW SIZE: 112 

MISSION: USS CRITTENDEN was a CROSSROADS target ship and arrived at Bikini prior 

to June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 (0900) 

BAKER 25 July 46 (0835) 

23 KT 

23 KT 

Air Burst ft) 

Shallow Underwater f t) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June-3 July Evacuated aboard BEXAR 0.005 

(Observed Shot ABLE from a distance 

of 22 miles) 

4 July -17 July Aboard CRITTENDEN 0.040 

18 July -19 July Evacuated aboard BEXAR 0.000 

20 July -23 July Aboard CRITTENDEN 0.004 

BAKER 

24 July -19 August Evacuated aboard BEXAR 0.209 

(Observed Shot BAKER from a distance 

of 16 miles) 

19 August-28 August Crew transferred to GENEVA GEORGE 

CLYMER and others (16). 

Total calculated dose up until the date when the crew splintered: 0.258 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: CRITTENDEN was towed to Kwajalein in August 1946 and then 

towed to San Francisco in January 1947. While at San Francisco, it underwent 

radiological tests until October 5, 1948 when it was sunk by explosive tests at 

32 
-

 CRITTEMDEN 77) 

100 

10 

1.0 

0.1 

SEPT 1 10 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-10. Shipboard Gamma Intensity vs. Time USS CRITTENDEN 

33 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS DAWSON 

CREW SIZE: 110 

MISSION: USS DAWSON was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION

ABLE 1 July 46 (0900) 23 KT Air Burst ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater (-90 ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June 2 July Evacuated aboard HENRICO 0.002 

(Observed Shot ABLE from a distance 

of 12 miles) 

3 July -17 July Aboard DA WSON 0.014 

18 July -19 July Evacuated aboard HENRICO 0.000 

20 July -23 July Aboard DA WSON 0.001 

BAKER 

24 July -12 August Evacuated aboard HENRICO 0.197 

(Observed Shot BAKER from a distance 

of 8 miles)

13 August-18 August Aboard ROCKBRIDGE 0.056 

18 August Crew transferred to BLADEN SAN 

MARCOS and others (13). 

Total calculated dose up until the date when the crew splintered: 0.270 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: DAWSON was towed to Kwajalein after CROSSROADS for 

radiological study. On April 19, 1948, it was sunk by gunfire on USS HELENA at 

47 N, 

34 
-

USS DAWSQN (APA-79) 

100 

10 

1.0 

0.1 

AMIDSHIPS 

I 10 3 0 I SEPT 100 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the data does not discriminate between 

individual curves for each location. 

Figure A-11. Shipboard Gamma Intensity vs. Time USS DAWSON 

35 
-

TARCETSHIPPARTICIPATIONSUMMARY 

NON-REMANNED 

SHIP: USS 

CREW SIZE: 127 

MISSION: USS was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION

ABLE July 46 23 KT Air Burst ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June July Evacuated aboard BEXAR (APA-237) 0.000 

Observed Shot ABLE from a distance 

of 22 miles) 

2 July -17 July Aboard 0.006 

18 July -19 July Evacuated aboard BEXAR 0.000 

20 July -23 July Aboard 0.000 

BAKER 

24 July -23 August Evacuated aboard BEXAR which departed 0.226 

Bikini on 23 August (Observed Shot BAKER

from a distance of 16 miles) 

Total calculated dose while at Bikini: 0.232 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: was towed to Kwajalein after CROSSROADS and was 

retained there for radiological study. On March 1948 it was scuttled off 

Kwajalein. 

36 
-

 (APA-81) 

1 

READ RIGHT 

TOPSIDE 

A DECKS 

AMIDSHIPS 

I SEPT 100 100 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the data does not discriminate between 

individual curves for each location. 

Figure A-12. Shipboard Gamma Intensity vs. Time USS 

37 
 

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: GASCONADE (APA-85) 

CREW SIZE: 105 

MISSION: USS GASCONADE was a CROSSROADS target ship and arrived at Bikini prior 

to June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July 1 and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June I July Evacuated aboard BEXAR 0.000 

(Observed Shot ABLE from a distance 

of 22 miles) 

2 July -17 July Aboard GASCONADE 0.001 

18 July -19 July Evacuated aboard BEXAR 0.000 

20 July -23 July Aboard GASCONADE 0.000 

BAKER 

24 July -12 August Evacuated aboard BEXAR 0.161 

(Observed Shot BAKER from a distance 

of 16 miles)

13 August-22 August Aboard SYLVANIA 0.062 

22 August Half of the crew transferred to SYLVANIA 

and half to BEXAR. 

Total calculated dose up until the date when the crew splintered: 0.224 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: GASCONADE was towed to San Francisco after CROSSROADS, 

arriving there on January 27, 1947. There it underwent structural and radiological

tests prior to being redesignated a target ship in March 1948. It was sunk by

torpedoes off southern California on July 21, 1948 at 

38 
-

 GASCONADE (APA-85) 

1 SEPT 

100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-13. Shipboard Gamma Intensity vs. Time USS GASCONADE 

39 
- -

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS GILLIAM 

CREW SIZE: 91 

MISSION: USS GILLIAM was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and

remained there as one of the 84 target ships for the nuclear test detonation that 

occurred on July 1, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June 8 July Evacuated aboard BOTTINEAU 0.001 

(Observed Shot ABLE from a distance

of 25 miles) 

8 July -5 September Aboard which departed Bikini 0.378 

on 5 September 

Total calculated dose while at Bikini: 0.379 REM 

FINAL DISPOSITION: GILLIAM sank in Bikini lagoon on July 1, 1946 as a result of Shot 

ABLE. 

40 
DATA NOT AVAILABLE TO RECONSTRUCT 

THE SHIPBOARD GAMMA INTENSITY CURVE 

41 
- 

- -

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS HUGHES (DD-410) 

CREW SIZE: 81 

MISSION: USS HUGHES was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 (0900) 23 KT Air Burst f 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater f t) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 22 miles) 

2 July -17 July Aboard HUGHES 0.082 

18 July -19 July Evacuated aboard 0.000 

20 July -23 July Aboard HUGHES 0.002 

BAKER 

24 July -31 July Evacuated aboard 0.024 

(Observed Shot BAKER from a distance 

of 15 miles)

1 August-27 August Aboard ROCKINGHAM 0.206 

which departed Bikini on 24 August 

28 August Crew transferred to NIAGARA 

Total calculated dose while at Bikini: 0.314 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: HUGHES was beached at Enyu Island on July 26, 1946. It was later

towed to San Francisco for radiological tests and subsequently used as a target ship. 

It was finally sunk attack on October 16, 1948 at 
-

USS HUGHES (DD-410) 

BELOW DECKS 

A DECKS 

0.1 A A 

1 10 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-14. Shipboard Gamma Intensity vs. Time USS HUGHES (DD-410) 

43 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS INDEPENDENCE 

CREW SIZE: 343 

MISSION: USS INDEPENDENCE was a CROSSROADS target ship and arrived at Bikini 

prior to June 30, 1946 to prepare for the operation. It was anchored in the lagoon

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater (-90 ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June 12 August Evacuated aboard 0.161 

(Observed Shots ABLE and BAKER from 

distances of 23 and 16 miles, 

respectively) 

13 August- 18 August Aboard AJAX 0.039 

18 August Approximately half the crew transferred 

to ARTEMIS. 

Total calculated dose up until the date when the crew splintered: 0.200 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: INDEPENDENCE was towed to Kwajalein on August 22, 1946. In 

October 1946, it was towed to San Francisco, arriving there on June 16, 1947. While 

at San Francisco, it underwent radiological tests and was eventually sunk in special

tests of new aerial and undersea weapons on January 26, 1951 at 

44 
-

USS INDEPENDENCE (CVL-22) 

0.1 

1 10 SEPT 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-15. Shipboard Gamma Intensity vs. Time INDEPENDENCE (CVL-22) 

45 
 

 

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS 

CREW SIZE: 119 

was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonation that 

occurred on 1, 1946. 

SHOT DATA: DATE YIELD ME) TYPE DETONATION

ABLE July 46 23 KT Air Burst 

AVERAGE CREW DOSE HISTORY 

DATE (1946) LOCATION BADGE 

ABLE 

DOSE 

30 June 9 July Evacuated 

(Observed 

aboard 

Shot ABLE from 

(AP-45) 

a distance 

0.002 

of 12 miles) 

Approximately half the crew transferred to 

AJAX for further assignment. 

Total calculated dose up until the date when the crew splintered: 0.002 REM 

FINAL DISPOSITION: sank in Bikini lagoon on July I, 1946 as a result of Shot 

ABLE. 

46 
DATA NOT AVAILABLE TO RECONSTRUCT 

THE SHIPBOARD GAMMA INTENSITY CURVE 

47 
 -

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS LCI-327 

CREW SIZE: 18 

MISSION: USS LCI-327 was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION

ABLE I July 46 23 Air Burst ft)

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard (APA-33) 0.000 

(Observed Shot ABLE from a distance 

of 22 miles)

2 July -17 July Aboard LCI-327 0.003 

18 July -19 July Evacuated aboard 0.000 

20 July -23 July Aboard LCI-327 0.000 

BAKER 

24 July -31 July Evacuated aboard 0.024 

(Observed shot BAKER from a distance 

of 15 miles) 

1 August-23 August Aboard ROCKBRIDGE which 0.284 

departed Bikini on 23 August. 

28 August Crew transferred to FALL RIVER AJAX 

and GENEVA 

calculated dose while at Bikini: 0.311 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: LCI-327 was towed to after CROSSROADS where it was 

beached on Bascombe Island. It was destroyed on October 30, 1947. 

48 
A BELOW DECKS 

1 SEPT 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-16. Shipboard Gamma Intensity vs. Time USS LCI-327 

49 
_ _.

-

---

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: LCI-332 

CREW SIZE: 17 

MISSION: USS was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1944. 

SHOT DATA: TEST DATE (TIME ) YIELD TYPE DETONATION 

ABLE I July 46 (0900) 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FIL BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard 0.000 

shot ABLE from a distance 

of 22 miles) 

2 July -17 July Aboard LCI-332 0.003 

IS July -19 July Evacuated aboad 0.000 

20 -23 July Aboard LCI-332 0.000 

BAKER 

24 July -31 July Evacuated aboard 0.024 

(Observed Shot BAKER from a distance 

of 15 miles) 

August-23 August Aboard ROCKBRIDGE which 0.284 

departed Bikini on 23 August. 

28 August Crew transferred to AJAX (12) and 

GENEVA 

calculated dose while at Bikini: 0.311 REM 

This reconstruction does not include aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: LCI-332 was towed to after CROSSROADS where it was 

sunk in deep water in September 1947. 
I1

!

!

I

 LCI-332 

! 

a 

! 

BELOW DECKS

 : : AMIDSHIPS 

I SEPT 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-17. Shipboard Gamma Intensity vs. Time USS LCT-332 

51 
 

_

TARGET SHIP PARTICIPATION SUMMARY 

SHIP: USS LCI-620 

CREW SIZE: 16 

MISSION: USS LCI-620 was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was beached in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION - - -

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE/BAKER 

30 June 3 August Evacuated aboard 0.063 

(Observed Shots ARLE and BAKER from 

distances of 22 and 15 miles, 

respectively) 

4 August-13 August Aboard ROCKBRIDGE 0.137 

14 August-22 August Enlisted crew aboard FILLMORE which 0.049 

departed Bikini on 22 August. 

14 August-23 August Officers aboard ROCKBRIDGE which 0.074 

departed Bikini on 23 August. 

Total calculated dose while at Bikini: 0.249 REM (Enlisted) 

0.274 REM (Officers) 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: LCI-620 was towed to sea on August 1946 and sunk by gunfire. 

52 
 

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS LSM-60 

CREW SIZE: 44 

MISSION: LSM-60 was a CROSSROADS target ship and arrived at Bikini on July 4, 

1946 to prepare for the operation. It was anchored in the lagoon and remained there 

as one of the 84 target ships for the nuclear test detonation that occurred July 25, 

1946. 

SHOT DATA: TEST DATE YIELD TYPE DETONATION 

BAKER 25 July 46 23 KT Shallow Underwater 

. AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

@ATE CREW LOCATION BADGE 

DOSE 

BAKER 

4 July-17 July Aboard LSM-60 0.000 

18 July-19 July Evacuated aboard ALBEMARLE 0.000 

20 July-24 July Aboard LSM-60 0.000 

25 July Evacuated aboard which 0.000 

deoarted Bikini on 25 July. 

(Observed Shot BAKER from a distance 

of 8 miles). 

Total calculated dose while at Bikini: 0.000 REM 

FINAL DISPOSITION: was the bomb carrier for CROSSROADS Shot BAKER and, 

hence, sank in Bikini as a result of this detonation. 

53 
 

- - _

-

--

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS LST-52 

CREW SIZE: 63 

MISSION: USS LST-52 was a CROSSROADS target ship and arrived at Bikini prior to June

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE I July 46 23 KT Air Burst ft)

BAKEK 25 July 46 23 KT Shallow Underwater 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June I July Evacuated aboard 

(Observed Shot ABLE from a distance 

0.000 

2 July -16 July 

17 July -18 July 

19 July -23 July 

of 23 miles)

Aboard LST-52 

Evacuated aboard 

Aboard LST-52 

0.012 

0.000 

0.000 

BAKER 

24 July -18 August 

19 August-26 August 

Evacuated aboard 

(Observed Shot BAKER from a distance 

of 16 miles) 

Aboard DIXIE which departed Bikini on 

0.203 

0.025 

25 August. 

Total calculated dose while at Bikini: 0.240 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: LST-52 was decommissioned on August 23, 1946 and towed to 

Kwajalein. There, it was sunk by gunfire from the USS OAKLAND in April 1948 at 

8-47 N, 

54 
USS LST-52 

100 

10 

A BELOW DECKS 

-

- -

1 

SEPT 1 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-18. Shipboard Gamma Intensity vs. Time USS LST-52 

55 
TARGET SHIP PARTICIPATION SUMMARY 

SHIP: USS LST-125 

CREW SIZE: 56 2 remained after 13 July) 

LST-125 was a CROSSROADS target ship and arrived at Bikini on July 9, 

1946 from Ray, P.I. to prepare for the operation. It was beached in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonation that 

occurred on July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

BAKER 25 46 (0835) 23 KT Shallow Underwater ft) 

AVERAGE CREW DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW ION FILM BADGE 

(REM) 

Unknown 

Total calculated dose while at Bikini: Unknown (All but 2 crew members departed 

by 13 July). 

FINAL DISPOSITION: LST-125 remained beached in Rikini lagoon until August 11, 1946. It 

was then towed out to sea and sunk by gunfire of the USS FALL RIVER on August 14, 

1946 at 

56 
 NOT AVAILABLE TO RECONSTRUCT 

THE SHIPBOARD GAMMA INTENSITY CURVE 

57 
 

 

_ -

-

TARGET SHIP PARTICIPATION SUMMARY 

SHIP: USS LST-133 

CKEW SIZE: 78 

MISSION: USS LST-133 was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was beached in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION --

ABLE I July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

25 June July Evacuated aboard (APA-230) 0.000 

(Observed Shot ABLE from a distance 

of 23 miles) 

2 July -16 July Aboard LST- 133 0.000 

17 July July Evacuated aboard ROCK WALL 0.000 

19 July -22 July Aboard LST-133 0.000 

BAKER 

23 July -19 August Evacuated aboard which departed 0.207 

Bikini on 19 August. 

(Observed Shot BAKER from a distance 

of 16 miles) 

28 August Majority of crew transferred to AJAX, 

DIXIE, and GENEVA. 

calculated dose while at Bikini: 0.207 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: LST-133 was decommissioned on August 28, 1946 and towed to 

Kwajalein where it was deliberately sunk on May 1948 at 

58 
-

 LST-133 

READ RIGHT 

A BELOW DECKS 

A 

SEPT 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-19. Shipboard Gamma Intensity vs. Time USS LST-133 

59 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS LST-220 

CREW SIZE: 59 

MISSION: USS LST-220 was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (T I YIELD ME) TYPE DETONATION __

ABLE 1 July 46 (0900) 23 KT Air Burst ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June I July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 23 miles) 

2 July -23 July Aboard LST-220 0.005 

BAKER 

24 July -19 August Evacuated aboard which departed 0.207 

Bikini on 19 August 

(Observed Shot BAKER from a distance 

of 16 miles) 

20 August-23 August Crew transferred to AJAX which departed 0.014 

bikini on 23 August. 

Total calculated dose while at Bikini: 0.226 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: LST-220 was decommissioned on August 27, 1946. It was towed to 

Kwajalein and deliberately destroyed on 12, 1948 at 

60 
-

USS LST-220 

A BELOW DECKS 

100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-20. Shipboard Gamma Intensity vs.Time USS LST-220 

61 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS LST-545 

CREW SIZE: 47 

MISSION: USS LST-545 was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION

ABLE 1 July 46 23 KT Air Burst f 

BAKER 25 July 46 23 KT Shallow Underwater f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTKUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

29 June I July Evacuated aboard (APA-230) 0.000 

(Observed Shot ABLE from a distance 

of 23 miles) 

2 July -17 July Aboard LST-545 0.002 

18 July -19 July Evacuated aboard 

20 July -23 July Aboard LST-545 0.000 

BAKER 

24 July -17 August Evacuated aboard 0.198 

(Observed Shot BAKER from a distance 

of 16 miles)

18 August-23 August Crew transferred to AJAX which 0.024 

departed Bikini on 23 August. 

calculated dose while at Bikini: 0.224 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: LST-545 was decommissioned on August 27, 1946. It was then 

towed to Kwajalein where it was deliberately sunk on 12, 1948 at 

62 
-

USS LST-545 

TOPSIDE 

A BELOW DECKS 

AMIDSHIPS 

0.1 

SEPT 100 

Days After BAKER 

3 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are

presented as a function of time in days after Shot Baker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-2 1. Shipboard Gamma Intensity vs. Time USS LST-545 

63 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS LST-661 

CREW SIZE: 62 (By 24 July only 18 men still at Bikini) 

MISSION: USS LST-661 was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION

ABLE 1 July 46 (0900) 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

29 June 1 July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 23 miles)

2 July -16 July Aboard LST-66 1 0.007 

17 July -18 July Evacuated aboard 0.000 

19 July -23 July Aboard LST-661 0.000 

BAKER 

24 July -18 August Evacuated aboard 0.203 

(Observed Shot BAKER from a distance 

of 16 miles)

19 August-23 August Aboard AJAX (AR-6) which departed 0.019 

Bikini on 23 August. 

28 August Crew transferred to GENEVA and others. 

Total calculated dose while at Bikini: 0.229 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: LST-661 was towed to Kwajalein after CROSSROADS where it was 

deliberately sunk on July 25, 1948 at 

64 
-

 TOPSIDE 

A BELOW DECKS 

AMIDSHIPS 

A 

SEPT 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

A-22. Shipboard Gamma Intensity vs. Time USS LST-661 

65 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS 

CREW SIZE: 109 

MISSION: was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst f 

BAKER 25 July 46 23 KT Shallow Underwater (-90 f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June 2 July Evacuated aboard BOTTINEAU 0.001 

(Observed Shot ABLE from a distance 

of 25 miles)

3 July -17 July Aboard 0.000 

18 July -23 July Evacuated aboard BOTTINEAU 0.000 

BAKER 

24 July- 6 August Evacuated aboard BOTTINEAU 0.131 

(Observed Shot BAKER from a 

of 16 miles) 

7 August-II August Aboard ROCKBRIDGE 0.079 

12 August-25 August Aboard DIXIE (AD-14) which departed 0.073 

Bikini on 25 August. 

27 August of crew transferred to BLADEN. 

Total calculated dose while at Bikini: 0.284 REM 

This reconstruction does not include tirne aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: was decommissioned on August 28, 1946. It was towed 

to Kwajalein for radiological tests and was deliberately sunk on April 4, 1948 by 

guns and torpedoes of DESDIV 12 at 

66 
- 

USS (DD-402) 

BELOW DECKS 

READ RIGHT 

BELOW DECKS 

A 

1 AUG 1 1 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-23. Shipboard Gamma Intensity vs. Time (DD-402) 

0.1 

67 
_ -

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS 

CREW SIZE: 126 

MISSION: USS was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June- July Evacuated aboard BOTTINEAU 0.000 

(Observed Shot ABLE from a distance

of 25 miles) 

2 July -17 July Aboard 0.000 

18 July -19 July Evacuated aboard BOTTINEAU 0.000 

20 July -23 July Aboard 0.000 

BAKER 

24 July -7 August Evacuated aboard BOTTINEAU 0.143 

(Observed Shot BAKER from a distance 

of 16 miles) 

8 August-17 August Aboard 0.098 

18 August -20 August Half aboard BLADEN which 0.014 

departed Bikini on 20 August.

Remaining crew transferred to various units. 

Total calculated dose while at Bikini: 0.255 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: was towed to Kwajalein sometime after August 18, 

1946. It remained there for decontamination experiments until it was scuttled off 

Kwajalein on March 22, 1948. 

68 
i

-

-

USS (DD-389) 

t 

BELOW DECKS 

TOPSIDE 

A BELOW DECKS 

AMIDSHIPS 

I SEPT 1 100 

Days After BAKER 

AMIDSHIPS 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-24. Shipboard Gamma Intensity vs. Time USS MLJGFORD (DD-389) 

69 
 

-

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS 

CREW SIZE: 112 

MISSION: USS was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTKUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard BOTTINEAU 0.000 

(Observed Shot ABLE from a distance 

of 25 miles) 

2 July -23 July Aboard 0.003 

BAKER 

24 July 6 August Evacuated aboard BOTTINEAU 0.131 

(Observed Shot BAKER from a distance 

of 16 miles) 

7 August -17 August Aboard ROCKBRIDGE 0.140 

17 August-28 August Crew transferred to 

and others. 

Total calculated dose up until the date when the crew splintered: 0.274 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: was decommissioned on August 28, 1946. It had been 

towed to where it remained until it was destroyed by gunfire on April 18, 

1948 at 

70 
 ._

-

 (DD-413) 

I 

0.1 .ooo 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-25. Shipboard Gamma Intensity vs. Time LJSS (DD-413) 

71 
-

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: NACATO Ex-Japanese BB) 

CREW SIZE: 172 

MISSION: NAGATO was a CROSSROADS target ship and arrived at Bikini prior to June 

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June 6 July Evacuated aboard ROCKINGHAM 0.001 

(Observed Shot ABLE from a distance 

of 18 miles) 

7 July -15 July Aboard ROCKBRIDGE 0.008 

(75 men transferred to CHILTON and 

US on 12 July) 

BAKER 

16 July 4 August Aboard ROCKINGHAM 0.084 

(Observed Shot BAKER from a distance 

of 16 miles) 

4 August Crew transferred to FALL RIVER 

APPLING SALT LAKE CITY and others. 

Total calculated dose up until the date when the crew splintered: 0.093 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: NAGATO sank on the night of 29-30 July 1946 in Bikini lagoon as a 

result of shot BAKER. 

72 
-

NAGATO (EX-JAPANESE BB) 

0.1 

TOPSIDE 

BELOW DECKS 

000 1 

SEPT 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-26. Shipboard Gamma Intensity vs. Time NAGATO (EX-JAPANESE BB) 

73 
 

 

_.__

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: NEVADA 

CREW SIZE: 403 

MISSION: USS NEVADA was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the target ships for the nuclear test detonations that 

occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE YIELD TYPE DETONATION - - -

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater f 

AVERAGE CKEW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION BADGE 

DOSE 

ABLE 

I July 8 July Evacuated aboard GEORGE CLYMER (APA-27) 0.000 

(Observed Shot ABLE from a distance 

of 21 miles) 

9 July -16 July Aboard NEVADA 0.012 

17 July July Evacuated aboard GEOKGE CLYMER 0.000 

19 July -23 July Aboard NEVADA 0.006 

BAKER 

24 July -17 August Evacuated aboard GEOKGE CLYMER 

(Observed Shot BAKER from a distance 

of 16 miles) 

August-19 August Aboard COKTLAND which departed 0.009 

Bikini on 19 August 

19 August-29 August Crew transferred to GENEVA and 

CORTLAND (224) 29 August, GEORGE CLY MER 

(71) 19 August, DIXIE and GENEVA 

28 August. 

Total calculated dose while at Bikini: 0.261 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: NEVADA was decommissioned at Kwajalein on 29 August 1946 and 

then towed to Pearl Harbor for radiological testing, arriving 15 May 1947. On 31 

July 1948, after four days of gunfire, bombs, rockets, and torpedoes from Task 

12, it sank 65 miles SW of Pearl Harbor at in 2600 fathoms of . 

7 4 
 

-

USS NEVADA (BB-36) 

0.1 

READ RIGHT 

I 

TOPSIDE 

AMIDSHIPS 

SEPT 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper

intensity scale. 

individual curves 

In some cases the available data 

for each location. 

does not discriminate between 

Figure A-27. Shipboard Gamma Intensity vs. Time NEVADA 

75 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS NEW YORK (55-34) 

CREW SIZE: 536 

MISSION: USS NEW YORK was a CROSSROADS target ship and arrived at Bikini on June 

15, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July 1 and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION

ABLE 1 July 46 (0900) 23 KT Air ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard ROCKBRIDGE 0.000 

(Observed Shot ABLE from a distance 

of 21 miles) 

2 July -17 July Aboard NEW YORK 0.006 

17 July -18 July Evacuated aboard ROCKBRIDGE 0.000 

July -23 July Aboard NEW YORK 0.000 

BAKER 

24 July -23 August Evacuated aboard ROCKBRIDGE which 0.325 

departed Bikini on 23 August. 

(Observed shot from a distance 

of 16 miles) 

27 August Crew transferred to 

GENEVA (63) and DIXIE (17). 

Total calculated dose while at Bikini: 0.331 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: NEW YOKK was towed to Kwjalein on August 22, 1946 where it was 

decommissioned on August 29, 1946. It was then towed to Pearl Harbor for 

radiological testing, arriving 15 March 1947. It was deliberately sunk 40 miles SW of 

the harbor on July 8, 1948. 

76 
 

 

- j

!

-

USS NEW YORK (BB-34) 

0.1 

BELOW DECKS 

DECON 

, , 

. 

TOPSIDE 

BELOW DECKS 

1 10 100 1000 

Days After BAKER 

SHIPBOARD INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sornetimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-28. Shipboard Gamma Intensity vs. Time NEW YORK (BB-34) 

77 
 

~

-

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS PENNSYLVANIA 

CKEW SIZE: 434 

USS PENNSYLVANIA was a CROSSROADS target ship and arrived at Bikini 

prior to June 1946 prepare for the operation. It was anchored in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July I and July 25, 1946. 

SHOT DATA: TEST ___ DAT E (TIME) YIELD - - TYPE DETONATION -._ 

ABLE 1 July 46 23 KT Air Burst f 

BAKER 25 July 46 23 KT Shallow Underwater 

AVERAGE CKE W MEMBER DOSE HISTOKY 

RECONSTKUCTED 

DATE CREW LOCATION BADGE 

DOSE 

ABLE 

30 June 2 July of crew evacuated aboard 

GEOKGE CLYMER 0.000 

30 June 2 July Final detail evacuated aboard 

ROCKBKIDGE 0.001 

(Observed shot ABLE from a distance 

of 21 miles) 

3 July -16 July Aboard PENNSYLVANIA 0.000 

17 July July Evacuated aboard GEOKGE CLYMEK 0.000 

19 July -23 July 4board PENNSYLVANIA 0.000 

BAKER 

24 July -26 July Majority of crew evacuated aboard 

GEOKGE 0.000 

Final detail evacuated aboard 0.000 

(Observed Shot BAKER from a distance 

of 16 miles) 

27 July-15 August Aboard GEOKGE CL YMER 0.222 

16 August-21 August Aboard which departed 0.032 

Bikini on 21 August. 

28 August Crew transferred to various units. 

Total calculated dose while at Bikini: 0.255 KEM if aboard for ABLE 

0.254 REM if aboard GEORGE CLYMER for ABLE 

This reconstruction does not include tirne aboard the target ship for activities such as 

control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DIS PENNSYLVANIA was on 29, 1946. It 

remained in Kwajalein lagoon for radiological and structural studies until it was 

deliberately sunk off Kwajalein on February 1943. 
 

 

/

t

-

- : !

I

-

 PENNSYLVANIA (BB-38) 

IDE 

i 

: 

t , 

BELOW 

READ LEFT 

1.0 - - AND I 

I 

I I III II 

1 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-29. Shipboard Gamma vs. Time PENNSYLVANIA 

79 
 

_

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS PENSACOLA 

CREW SIZE: 354 

USS PENSACOLA was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION - -

ABLE July 46 23 KT Air Burst ft) 

BAKEK 25 July 46 (0835) 23 KT Shallow Underwater ft) 

AVEKAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE 

ABLE 

30 June 6 July Evacuated aboard ROCKINGHAM 0.001 

(Observed Shot ABLE from a distance 

of 18 miles) 

7 July -17 July Aboard PENSACOLA 0.010 

18 July Evacuated aboard ROCKINGHAM 0.000 

14 -24 July Aboard PENSACOLA 0.004 

BAKER 

25 July -19 August Evacuated aboard ROCKINGHAM 0.216 

(Observed Shot BAKER frorn a distance 

of 16 miles) 

19 August-28 August Crew transferred to GEORGE CLYMER 

FILLMORE and HAVEN 

Total calculated dose up until the date when the crew splintered: 0.231 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: PENSACOLA was towed to Kwajalein and then to Bremerton for 

radiological tests. It was deliberately sunk on November 1948 at 

in 1400 fathoms. 
 

 

I I

-

I I 

I t REA 

A BELOW DECKS 

h 

PENSACOLA (CA-24) 

0.1 

1 

Days After B

100 

AKER 

SHIPAOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-30. Shipboard Gamma Intensity vs. Time PENSACOLA (CA-24) 
_

-

-

---

TARCETSHIPPARTICIPATIONSUMMARY 

NON-REMANNED 

SHIP: USS PILOTFISH 

CREW SIZE: 52 

MISSION: USS PILOTFISH was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June 3 July Evacuated aboard BOTTINEAU 0.001 

Shot ABLE from a distance 

of 25 miles) 

3 July -23 July Aboard PILOTFISH 0.001 

BAKER 

24 July 8 August Evacuated aboard BOTTINEAU 0.158 

(Observed Shot BAKER from a distance 

of 16 miles) 

9 August-18 August Aboard FILLMORE 0.049 

18 August Crew transferred to 

DENTUDA TUNA SYLVANIA 

COUCAL and ST. CROIX 

Total calculated dose up until the date when the crew splintered: 0.209 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: PILOTFISH sank in Bikini lagoon as a result of Shot RAKER. It was 

eventually resurfaced and salvaged for examination, but then, resunk as a target on 

October 16, 1948. 

82 
DATA NOT AVAILABLE TO RECONSTRUCT 

THE SHIPBOARD GAMMA INTENSITY CURVE 

83 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: PRINZ EUGEN CA) 

CREW SIZE: 444 

MISSION: PRINZ EUGEN was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July 1 and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft)

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

ABLE 

DOSE (REM) 

30 June 2 July 

3 July -21 July 

Evacuated aboard ROCKINGHAM 

(Observed Shot ABLE from a distance 

of 18 miles)

Aboard PRINZ EUGEN 

(Probably a practice evacuation 

aboard the ROCKINGHAM on July) 

0.001 

0.001 

BAKER 

22 July -16 August 

16 August-20 August 

28 August 

Evacuated aboard ROCKINGHAM 

(Observed Shot BAKER from a distance 

of 16 miles) 

Aboard BLADEN which departed 

Bikini on 20 August

Crew transferred to GENEVA and 

0.200 

0.027 

others 

Total calculated dose while at Bikini: 0.229 REM 

This reconstruction does not include time aboard the target ship for activities such as 

control, decontamination or inspection after the detonations except when the

entire crew returned to live aboard the ship. 

FINAL PRINZ EUGEN was towed to Kwajalein after CROSSROADS. It 

was to be beached at Enubuj Island, but following a storm, it sank nearby on 

December 22, 1946. 

84 
PRINZ EUGEN (EX-GERMAN CA) 

1 10 SEPT 100 

-

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-31. Shipboard Gamma Intensity vs. Time PRINZ ELJGEN (EX-GERMAN CA) 

85 
- 

--

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS RALPH TALBOT 

CREW SIZE: 132 

MISSION: USS RALPH TALBOT was a CROSSROADS target ship and arrived at Bikini 

prior to June 30, 1946 to prepare for the operation. It was anchored in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft)

BAKER 25 July 46 23 KT Shallow Underwater f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 12 miles) 

2 July -17 July Aboard RALPH TALBOT 

18 July -19 July Evacuated aboard HENRICO 0.000 

20 July -23 July Aboard RALPH TALBOT 0.000 

BAKER 

24 July -13 August Evacuated aboard HENRICO 0.205 

(Observed Shot BAKER from a distance 

of 8 miles)

August-16 August Aboard ROCKINGHAM 0.023 

17 August-19 August Aboard which departed 0.015 

Bikini on 19 August. 

Total calculated dose while at Bikini: 0.267 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: RALPH TALBOT was decommissioned on August 28, 1946. It was 

towed to Kwajalein where it was retained for radiological study until it was 

deliberately sunk in 1948. 
 

 

I

j i

-

BELOW DECKS 

, READ RIGHT 

t-t 

BELOW DECKS 

USS RALPH TALBOT (DD-390) 

 : I i i . I I 

TOPSIDE , 

0.1 

I 1 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sornetimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure h-32. Shipboard Gamma Intensity Time USS RALPH TALBOT (DD-390) 

87 
_ _ _

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS RHIND 

CREW SIZE: 104 

MISSION: USS RHIND was a CROSSROADS target ship and arrived at Bikini prior to June 

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 (0900) 23 Air Burst ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater f t) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard 0.000 

(Observed shot ABLE from a distance 

of 22 miles) 

2 July -17 July Aboard RHIN D 0.055 

18 July -19 July Evacuated aboard 0.000 

2C July -24 July Aboard RHIND 0.002 

BAKER 

25 July -31 July Evacuated aboard 0.024 

(Observed Shot BAKER from a distance 

of 15 miles) 

1 August-19 August Aboard ROCKINGHAM 0.185 

19 August Crew transferred to 

ROCKINGHAM and (5). 

Total calculated dose up until the date when the crew splintered: 0.266 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: RHIND was decommissioned on August 28, 1946. After 

CROSSROADS it was towed to for radiological tests and subsequently 

scuttled on 22, 1948. 

88 
-

USS RHIND (DD-404) 

t 

A 

SEPT 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-33. Shipboard Gamma Intensity vs. Time USS RHIND (DD-404) 

89 
 

 

-

---

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: SAKAWA &x-Japanese-CL) 

CREW 143 (Estimated) 

MISSION: SAKAWA was a CQOSSROADC target ship and arrived at Bikini prior to June 

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonation that occurred on 

July 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE 

ABLE 1 July 46 23 Air ft) 

CREW 

DATE LOCATION BADGE 

30 June 8 July aboard (APA-229) 0.003 

(Observed Shot from a distance 

of 18 miles) 

8 July Crew transferred to OTTAWA 

NIAGARA LST-113 

NEW YORK and AJAX (19). 

Total calculated dose up until the date when the crew splintered: 0.003 REM 

This reconstruction does not include time aboard the target ship for activities as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL The SAKAWA sank in lagoon on July 1946 as a result of 

Shot 

90 
DATA NOT AVAILABLE TO RECONSTRUCT 

THE SHIPBOARD GAMMA INTENSITY CURVE 

91 
 

-

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS SALT LAKE CITY (CA-25) 

CREW SIZE: 335 

MISSION: USS SALT LAKE CITY was a CROSSROADS target ship and arrived at Bikini 

prior to June 30, 1946 to prepare for the operation. It was anchored in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst f 

BAKER 25 July 46 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June 6 July Evacuated aboard ROCKBRIDGE 0.001 

(Observed Shot ABLE from a distance 

of 21 miles) 

7 July -16 July Aboard SALT LAKE CITY 0.003 

17 July -18 July Evacuated aboard ROCKBRIDGE 0.000 

19 July -23 July Aboard SALT LAKE CITY 0.001 

BAKER 

24 July -23 August Evacuated aboard ROCKBRIDGE which 0.325 

departed Bikini on 23 August. 

(Observed Shot BAKER from a distance 

of miles) 

28 August Crew transferred to 

BRIDGE FILLMORE (14) and others. 

Total calculated dose while at Bikini: 0.330 REM 

This reconstruction does not include tirne aboard the target ship for activities such as 

damage control, or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: SALT LAKE CITY was decommissioned on August 28, 1946. After 

CROSSROADS it was towed to Bremerton via Pearl Harbor for radiological tests. 

On May 25, 1948, it was sunk off San Diego at after a 4-hour 

bombardment from planes and ships. 

92 
 

 

 

 

-

--

,

-

USS SALT LAKE CITY (M-25) 

i : ::

: 

BELOW DECK 

0.1 

i I 

TOPSIDE 

A BELOW DECKS 

AMIDSHIPS 

I T 

I 

AMIDSHIPS --

READ RIGHT 

READ LEFT 

SEPT 1 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-34. Shipboard Gamma Intensity vs. Time SALT LAKE CITY (CA-25) 

93 
_ - - -

-

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS SARATOGA 

CREW SIZE: 589 

MISSION: USS SARATOGA was a CROSSROADS target ship and arrived at Bikini prior to

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM)

ABLE 

30 June I July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 23 miles) 

2 July -16 July Aboard SARATOGA 0.002 

17 July -18 July Evacuated aboard 0.000 

19 July -24 July Aboard SARATOGA 0.000 

BAKER 

25 July 3 August Evacuated aboard 0.070 

(Observed Shot BAKER from a distance 

of 16 miles) 

3 August- 5 August Crew transferred to various units. 

Total calculated dose up until the date when the crew splintered: 0.072 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: SARATOGA sank in Bikini lagoon on July 25, 1946 as a result of 

Shot BAKER. 

94 
DATA NOT AVAILABLE TO RECONSTRUCT 

THE SHIPBOARD GAMMA INTENSITY CURVE 

95 
 

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS SKATE (SS-305) 

CREW SIZE: 53 

MISSION: USS SKATE was a CROSSROADS target ship and arrived at Bikini prior to June 

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July 1 and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE DETONATION

ABLE 1 July 46 (0900) 23 KT Air Burst ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater f t) 

DATE 1946) 

30 June 4 July 

5 July -23 July 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

Evacuated aboard BOTTINEAU 0.001 

(Observed Shot ABLE from a distance 

of 25 miles) 

Aboard SKATE 0.270 

24 July -8 August 

9 August-22 August 

27 August 

BAKER 

Evacuated aboard BOTTINEAU 0.158 

(Observed Shot BAKER from a distance 

of 16 miles) 

Aboard FILLMORE which departed 0.066 

Bikini on 22 August. 

Aboard FULTON 

Total calculated dose while at Bikini: 0.508 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection alter the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: On August 23, 1946, SKATE was towed to Kwajalein and then on to 

Pearl Harbor, arriving there on September 5, 1946. It was then towed to San 

Francisco, arriving there on October 22, 1946 and subsequently placed in at 

MARE ISLAND. SKATE was decommissioned on December 1946 and deliberaely 

sunk in 1948 at 

96 
-

LJSS SKATE (SS-305) 

100 

10 

1.0 

0.1 00 01 

BELOW 

- -

I SEPT 1 10 10 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sornetimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-35. Shipboard Gamma Intensity vs. Time SKATE (SS-305) 

97 
 

_ _

-

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-KE MANNE D 

SHIP: USS SKIPJACK 

CKEW SIZE: 78 

MISSION: USS SKIPJACK was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July 1 and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst 

BAKER 25 July 46 23 KT Shallow f 

AVERAGE CKEW MEMBER DOSE HISTORY 

RECONSTKUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard BOTTINEAU (APA-235) 0.000 

(Observed shot ABLE from a distance 

of 25 miles) 

2 July -23 July Aboard SKIPJACK 0.028 

BAKER 

24 July 8 August Evacuated aboard BOTTINEAU 0.158 

Shot BAKER from a distance 

of 16 miles) 

9 August- 17 August Aboard FILLMORE 0.044 

17 August-21 August Crew transferred to 

TUNA SKATE 

and 1). 

Total calculated dose up until the date when the crew splintered: 0.230 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: SKIPJACK sank in Bikini lagoon on July 25, 1946 as a result of Shot 

BAKER. It was salvaged on September 2, 1946 and towed to Pearl Harbor, arriving 

there on 22 September. It was subequently towed to San Francisco and 

sunk by aircraft rocket attack on August 11, 1948 at . . 
-

- -

USS SKIPJACK (SS-184) 

DECKS 

OF 

TOPSIDE 

BELOW DECKS 

AMIDSHIPS 

READ LEFT 

A 

SEPT 1 100 

Days After BAKER 

INTENSITY CURVES: The SKIPJACK remained 

submerged in Lagoon until it was salvaged on September 2, 1946. Several 

topside radiation readings were obtained while the SKIPJACK was submerged in 150 

feet of water. The range in values is depicted in Figure A-36. Radiation data aboard 

the SKIPJACK after it was surfaced have not been located, hence, the intensity curves 

shown here have been estimated based on data for the USS SKATE another 

target submarine that was approximately the same distance from the Shot RAKER 

surf ace zero. 

Figure A-36. Shipboard Gamma Intensity vs. Time USS SKIPJACK (SS-184) 

99 
 

-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS STACK 

CREW SIZE: 102 

MISSION: USS STACK was a CROSSROADS target ship and arrived at Bikini prior to June 

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 23 KT Air Burst ft) 

BAKER 25 July 46 23 KT Shallow Underwater 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE (1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June 1 July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 22 miles) 

2 July -17 July Aboard STACK 0.014 

18 July Evacuated aboard 0.000 

19 July -23 July Aboard STACK 0.000 

BAKER 

24 July -31 July Evacuated aboard 0.024 

(Observed Shot BAKER from a distance 

of 15 miles) 

I August-19 August Aboard ROCKINGHAM 0.185 

19 August Crew transferred to COM DES PAC (81) 

and ROCKINGHAM 

calculated dose up until the date when the crew splintered: 0.223 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: STACK was decommissioned on August 28, 1946. It was towed to 

Kwajalein where it was retained for radiological study until April 24, 1948 when it 

was sunk by gunfire from four destroyers off Kwajalein. 

100 
 STACK (DD-406) 

0 

AMIDSHIPS 

Days After BAKER 

 

 

 -.

-

TOPSIDE 

A BELOW DECKS 

AMIDSHIPS 

t 

1000 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sornetimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not between 

individual curves for each location. 

Figure A-37. Shipboard Gamma Intensity vs. Time STACK (DD-406) 

101 
- _

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS TKIPPE 

SIZE: 135 

USS TKIPPE was a CROSSROADS target ship and arrived at Bikini on June 

1946 to prepare for the operation. It was utilized as a regular operating ship during 

Test ABLE. On July 16, 1946 it was anchored in the lagoon and there as 

one of the 84 target ships for the nuclear test detonation that occurred on July 25, 

1946. 

SHOT DATA: TEST DATE (TIME ) YIEL D __ TYPE DETONATION - - -

BAKER 25 July 46 23 Shallow Underwater (-90 ft) 

AVERAGE CKEW MEMBER DOSE HISTORY 

RECONSTRUCTE D 

DATE (1946) CKEW LOCATION FILM BADGE 

DOSE 

30 June -17 July Aboard TRIPPE 0.000 

Shot ABLE from a distance 

of 13 miles) 

18 July -19 July Evacuated aboard (APA-33) o.ooc 

20 July -23 July Aboard TRIPPE 0.000 

BAKER 

24 July -31 July Evacuated aboard 0.024 

(Observed shot BAKER from a distance 

of 15 miles) 

I August-II Aboard BEXAR 0.127 

August-25 August Aboard DIXIE which departed 0.073 

Bikini on 25 August. 

28 August Crew transferred to CORTLAND 

Total calculated dose while at Bikini: 0.224 REM 

This reconstruction does not include aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: TRIPPE was towed to Kwajalein after CROSSROADS for 

radiological tests. On February 3, 1948, it was towed to deep water off Kwajalein 

and deliberately sunk by gunfire. 
-

 TOPSIDE 

A BELOW DECKS 

AMIDSHIPS 

TRIPPE (DD-403) 

0 1 

1 100 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-38. Shipboard Gamma Intensity vs. Time TRIPPE (DD-403) 

103 
-

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS WAIN WRIGHT 

CREW SIZE: 148 

MISSION: USS WAINWRIGHT was a CROSSROADS target ship and arrived at Bikini prior 

to June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July 1 and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 (0900) 23 KT Air Burst ft) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater ft) 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION FILM BADGE 

DOSE (REM) 

ABLE 

30 June 1 July Evacuated aboard BAYFIELO 0.000 

(Observed Shot ABLE from a distance 

of 22 miles) 

2 July -17 July Aboard WAINWRIGHT 0.005 

18 July Evacuated aboard 0.000 

19 July -23 July Aboard WAIN WRIGHT 0.000 

BAKER 

24 July -31 July Evacuated aboard 0.024 

(Observed Shot BAKER from a distance 

of miles) 

1 August-20 August Aboard BEXAR 0.189 

20 August Most of crew transferred to GEORGE CLYMER. 

Total calculated dose up until the date when the crew splintered: 0.218 REM 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, decontamination or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: WAINWRIGHT was towed to Kwajalein on August 23, 1946 and 

retained for radiological study. Subsequently, it was towed to sea and sunk by 

Destroyer Division 172 on July 5, 1948. 

104 
 

 

- *

;

-

USS KAINWRIGHT (DD-419) 

TOPSIDE, BELOW DECKS] 

AND AMIDSHIPS 

TOPSIDE 

A DECKS 

AMIDSHIPS 

100 

Days After BAKER 

1000 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves For each location. 

Figure A-39. Shipboard Gamma Intensity vs. Time LJSS (DD-419) 

105 
 

_

-

---

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS WILSON 

CREW SIZE: 115 

MISSION: USS WILSON was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation, It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 23 KT Air Burst f 

BAKER 25 July 46 23 KT Shallow Underwater (-90 f 

AVERAGE CREW MEMBER DOSE HISTORY 

RECONSTRUCTED 

DATE 1946) CREW LOCATION BADGE 

DOSE (REM) 

ABLE 

30 June July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 22 miles) 

2 July -17 July Aboard WILSON 0.010 

18 July Evacuated aboard 0.000 

19 July -23 July Aboard WILSON 0.000 

BAKER 

24 July -31 July Evacuated aboard 0.024 

(Observed Shot BAKER from a distance 

of 15 miles) 

I August-18 August Aboard BEXAR 0.179 

18 August-19 August Aboard which departed Bikini 0.009 

on 19 August. 

Total calculated dose while at Bikini: 0.222 

This reconstruction does not include time aboard the target ship for activities such as 

damage control, or inspection after the detonations except when the 

entire crew returned to live aboard the ship. 

FINAL DISPOSITION: WILSON was decommissioned on August 28, 1946. After 

CROSSROADS, it was towed to Kwajalein for radiological tests until it was scuttled 

in deep water off Kwajalein on March 8, 1948. 

106 
 

 

 

 

!

~

:

..

?

-

USS WILSON (DD-408) 

: : 

: :: 

: 

A BELOW DECKS 

AMIDSHIPS I 

ii 

1 SEPT 100 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-40. Shipboard Gamma Intensity VS. Time USS WILSON (DD-408) 

107 
 

_ -

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: YO-160 

CREW SIZE: 10 

MISSION: USS YO-160 was a CROSSROADS target ship and arrived at Bikini prior to June 

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July 1 and July 25, 1946. 

SHOT TEST DATE (TIME) TYPE DETONATION 

ABLE 1 July 46 23 Air Burst f 

BAKER 25 July 46 23 KT Shallow Underwater 

AVERAGE CREW MEMBER HISTORY 

RECONSTRUCTED 

DATE CREW LOCATION FILM BADGE 

Unknown 

Total calculated dose while at Bikini: 

FINAL DISPOSITION: YO-160 sank in Bikini lagoon as a result of Shot BAKER. 

108 
DATA NOT AVAILABLE TO RECONSTRUCT 

TYE INTENSITY CURVE 

109 
 

 

TARGET SHIP PARTICIPATION SUMMARY 

NON-REMANNED 

SHIP: USS YOG-83 

CREW SIZE: 10 

MISSION: USS YOG-83 was a CROSSROADS target ship and arrived at Rikini prior to June 

30, 1946 to prepare for the operation. It was anchored in the lagoon and remained 

there as one of the 84 target ships for the nuclear test detonations that occurred on 

July 1 and July 25, 1946. 

SHOT DATA: TEST DATE (T I ME) YIELD TYPE

ABLE 1 July 46 23 KT Air Burst 

BAKER 25 July 46 23 KT Shallow 

AVERAGE CREW DOSE HISTORY 

DATE CREW LOCATION 

RECONSTRUCTED 

BADGE 

DOSE 

Total calculated dose while at Bikini: Unknown 

FINAL YOG-83 was towed to Kwajalein and beached there on September 

23, 1946. It was retained for radiological study and ultimately sunk in deep water 

off Kwajalein on September 16, 1948. 

110 
 

 

,

-

USS YOG-83 

ECKS 

1 10 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-41. Shipboard Gamma Intensity vs. Time 

111 
TARGET SHIP PARTICIPATION SUMMARY 

UNMANNED 

SHIP: USS LCT-412 

CREW SIZE: N/A 

USS LCT-412 was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to participate in the operation. It was beached in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 (0900) 23 KT Air Burst feet) 

BAKER 25 July 46 23 KT Shallow Jnderwater feet) 

AVERAGE CREW MEMBER DOSE HISTORY: N/A 

FINAL DISPOSITION: LCT-412 was towed to Kwajalein for further disposition. It 

was finally sunk in deep water off Kwajalein about September 1947. 

112 
TARGET SUMMARY 

SHIP: USS LCT-414 

SIZE: N/A 

USS LCT-414 was a CQOSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to participate in the operation. It was beached in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July 1 and July 25, 1948. 

DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst feet) 

BAKER 25 July 46 23 Shallow Underwater feet) 

AVERAGE DOSE HISTORY: 

FINAL DISPOSITION: LCT-414 was was sunk by demolition charges at Bikini 

shortly after Shot BAKE!?. 

113 
 

TARGET SHIP PARTICIPATION SUMMARY 

LCT-705 

SIZE: 

MISSION: LCT-705 was a CROSSROADS target ship and arrived at Rikini prior to 

June 30, 1946 to participate in the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

DATA: TEST DATE YIELD TYPE 

ABLE 1 July 46 23 Air Burst 

RAKER 25 July 46 23 KT Shallow feet) 

AVERAGE DOSE N/A 

FINAL DISPOSITION: IJSS LCT-705 was found to be structurally sound after 

Operation CROSSROADS. It was towed to Kwajalein and eventually sunk in deep 

water off Kwajalein in September 1947. 

114 
 

 

 

2

-

USS LCT-705 

TOPSIDE, BELOW DECKS 

AND AMIDSHIPS 

TOPSIDE, BELOW DECKS 

AND AMIDSHIPS I 

I READ LEFT 

10 100 

Days After BAKER 

TOPSIDE 

BELOW DECKS 

AMIDSHIPS 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In 

individual curves for

some cases the available data does 

each location. 

not discriminate between 

Figure A-42. Shipboard Gamma Intensity vs. Time LCT-705 
 

TARGET SHIP PARTICIPATION SUMMARY 

SHIP: USS LCT-746 

CREW SIZE: N/A 

MISSION: LCT-746 was a CROSSROADS target ship and arrived at Rikini prior to 

June 30, 1946 to participate in the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July 1 and July 25, 1946. 

TEST D A T E YIELD TYPE 

July 46 23 KT Air Rurst feet) 

RAKER. 25 July 46 23 KT Shallow Underwater feet) 

AVERAGE CREW HISTORY: 

FINAL With the completion of Operation USS LCT-746 

was taken to Kwajalein where it was destroyed in 1947. 

116 
TARGET SHIP PARTICIPATION SUMMARY 

UNMANNED 

SHIP: USS LCT-812 

CREW SIZE: N/A 

LCT-812 was a CROSSROADS target ship and arrived at Rikini prior to 

June 30, 1946 to participate in the operation. It was beached in the lagoon and 

remained there as one of the target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST YIELD TYPE DETONATION 

I July 46 (0900) 23 KT Air Burst feet) 

25 July 46 (0835) 23 KT Shallow Underwater feet) 

AVERAGE CREW DOSE HISTORY: N/A 

FINAL LCT-812 was sunk by demolition charges at Rikini shortly 

after Shot RAKER. 

117 
TARGET SHIP PARTICIPATION SUMMARY 

SHIP: USS LCT-816 

CREW SIZE: Y/A 

MISSION: USS LCT-816 was a CROSSROADS target ship and arrived at prior to 

June 30, 1946 to participate in the operation. It was anchored in the lagoon and 

remained there as one of the 84 ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST D A T E YIELD TYPE 

ARLE 1 July 46 23 Air Burst feet) 

RAKER 25 July 46 23 KT Shallow feet) 

AVERAGE CREW DOSE YISTORY: 

FINAL DISPOSITION: LCT-816 was found badly holed and hard on the beach at 

It was taken to Kwajalien where it was sunk in deep water in June 1947. 

118 
 

-

uss LCT-816 

BELOW 

AMIDSHIPS 

TOPSIDE 

-- BELOW DECKS 

1 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-43. Shipboard Gamma Intensity vs. Time USS LCT-816 

119 
TARGET SHIP PARTICIPATION SUMMARY 

SHIP: USS LCT-8 18 

CREW SIZE: N/A 

MISSION: LCT-818 was a CROSSROADS target ship and arrived at Bikini prior to 

June 30, 1946 to participate in the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. 

SHOT DATA: TEST DATE YIELD TYPE 

ABLE 1 July 46 23 Air Burst feet) 

RAKER 25 July 46 23 Shallow Jnderwater (-90 feet) 

AVERAGE CREW DOSE HISTORY: N/A 

FINAL DISPOSITION: LCT-818 was found to be structurally sound after 

Operation CROSSROADS. It was towed to Ywajalein and eventually sunk in deep 

water off Kwajalein in September 1947. 

120 
-

 SEPT 1 10 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-44. Shipboard Gamma Intensity vs. Time USS LCT-818 

121 
 

TARGET SHIP PARTICIPATION SUMMARY 

UNMANNED 

SHIP: USS LCT-374 

CREW SIZE: N/A 

LCT-874 was a target ship and arrived at Bikini prior to 

June 30, 1946 to participate in the operation. It was anchored in the lagoon and 

remained there as one of the 84 target ships for the nuclear test detonations that 

occurred on July 1 and July 25, 1946. 

SHOT DATA: TEST DATE YIELD TYPE DETONATION 

1 July 46 23 KT Air Burst feet) 

BAKER 25 July 46 23 KT Shallow 

AVERAGE CREW DOSE HISTORY: N/A 

FINAL DISPOSITION: LCT-874 was found to be structurally sound after 

Operation It was towed to Kwajalein and eventually sunk in deep 

water off Kwajalein in September 1947. 

122 
 

 

-TM

-

 LCT-874 

TOPSIDE 

t t

I i ii-i i i i i! 

t- AMIDSHIPS 

1 1 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-45. Shipboard Gamma Intensity vs. Time USS LCT-874 

123 
 

TARGET SHIP PARTICIPATION SUMMARY 

SHIP: USS LCT-1013 

MISSION: USS LCT-1013 was a CROSSROADS target ship and arrived at Rikini prior 

to 30, 1946 to participate in the operation. It was anchored in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July 1 and July 25, 1946. 

DATA: TEST DATE (TIME) TYPE 

ABLE I July 46 (0900) 23 KT Air Burst feet) 

BAKER 25 July 46 23 KT Shallow Underwater feet) 

AVERAGE CREW MEMBER DOSE HISTORY: N/A 

FINAL DISPOSITION: LCT-1013 was found to be structurally sound after 

Operation It was towed to Kwajalein and eventually sunk in deep 

water off Kwajalein in September 1947. 

124 
-

USS LCT-1013 

A BELOW DECKS 

.oooo 

1 SEM 100 100

Days After BAKER 

SHIPBOARD INTENSITY CURVES: The average gamma intensity curves for

topside and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sornetimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-46. Shipboard Gamma Intensity vs. Time USS LCT-1013 

125 
TARGET SHIP PARTICIPATION SUMMARY 

UNMANNED 

SHIP: USS LCT-1078 

CREW SIZE: N/A 

MISSION: USS LCT-1078 was a CROSSROADS target ship and arrived at Rikini prior 

to June 30, 1946 to participate in the operation. It was anchored in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July and July 25, 1946. 

SHOT DATA: TEST D A T E YIELD TYPE DETONATION 

1 July 46 23 KT Air feet) 

RAKER 25 July 46 23 KT Shallow IJnderwater t-90 feet) 

AVERAGE DOSE HISTORY: N/A 

FINAL USS LCT-1078 was found to be structurally sound after 

Operation It was towed to Kwajalein and eventually sunk in deep 

water off Xwajalein in September 1947. 

126 
-

USS LCT-1078 

. 

t----t---t--+ I t . , . 

C 

0 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-47. Shipboard Gamma Intensity vs. Time USS LCT-1078 

127 

TOPSIDE 

BELOW DECKS 

AMIDSHIPS 

1 , SEM 100 1000 

Days After BAKER 
TARGET SHIP PARTICIPATION SUMMARY 

UNMANNED 

SHIP: uss LCT-1112 

SIZE: N/A 

MISSION: USS LCT-1112 was a CROSSROADS ship and arrived at Bikini prior 

to June 30, 1946 to participate in the operation. It was anchored in the 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July and July 25, 1946. 

SHOT DATA: TEST D A T E YIELD TYPE DETONATION 

ABLE July 46 (0900) 23 Air Rurst feet) 

BAKER 25 July 46 23 KT Shallow feet) 

AVERAGE CREW DOSE HISTORY: N/A 

FINAL DISPOSITION: LCT-1112 was found to be structurally sound after 

Operation CROSSROADS. It was towed to Kwajalein and eventually sunk in deep 

water off Kwajaiein in September 1947. 

128 
 

 

!

-- * * - I 1

-

USS LCT-1112 

BELOW DECKS 

-- I I ... ........ ....... ..... 

TOPSIDE 

... ........ ... ........ 

. A 

SEM 30

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-48. Shipboard Gamma Intensity vs. Time LCT-1112 

129 
TARGET SHIP PARTICIPATION 

SHIP: LCT- 1113 

SIZE: N/A 

LCT-1113 was a CROSSROADS target ship and arrived at Rikini prior 

to June 30, 1946 to participate in the operation. It was anchored in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July I and July 25, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TY DETONATION 

ABLE 1 July 46 23 KT Air Burst feet) 

BAKER 25 July 46 23 Shallow Underwater feet) 

AVERAGE CREW DOSE HISTORY: N/A 

FINAL DISPOSITION: USS LCT-I was found badly holed and hard on the beach at 

Bikini. It was taken to Kwajalien where it was sunk in deep water in June 1947. 

130 
 

-

USS LCT-1113 

BELOW DECKS 

AND 

AMIDSHIPS 

. BELOW DECKS 

1 

1 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-49. Shipboard Gamma Intensity vs. Time USS LCT-1113 

131 
 

TARGET PARTICIPATION SUMMARY 

UNMANNED 

SHIP: LCT-1114 

CREW SIZE: N/A 

LCT-1 was a CROSSROADS target ship and arrived at Bikini prior 

to June 30, 1946 to participate in the operation. It was anchored in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July 1 and July 25, 1946. 

SYOT DATA: TEST D A T E YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst feet) 

BAKER 25 July 46 23 Shallow Underwater feet) 

AVERAGE CREW DOSE HISTORY: N/A 

FINAL DISPOSITION: JSS LCT-1114 was was sunk by demolition charges at Bikini 

shortly after Shot RAKER. 

132 
TARGET SHIP PARTICIPATION SUMMARY 

UNMANNED 

SHIP: LCT-1 

CREW SIZE: N/A 

LCT-1115 was a CROSSROADS target ship and arrived at prior 

to June 30, 1946 to participate in the operation. It was anchored in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July I and July 25, 1946. 

SHOT DATA: TEST D A T E YIELD TYPE 

ARLE 1 July 46 23 Air Rurst feet) 

RAKER 25 July 46 23 KT Shallow Underwater feet) 

AVERAGE CREW DOSE HISTORY: N/A 

FINAL DISPOSITION: UFS LCT-1115 was found to be structurally sound after 

Operation CROSSROADS. It was towed to Kwajalein and eventually sunk in deep 

water off Kwajalein in September 1947. 

133 
TARGET SHIP PARTICIPATION 

SHIP: USS LCT-1175 

CREW SIZE: N/A 

USS LCT-1175 was a CROSSROADS target ship and arrived at Rikini prior 

to June 30, 1946 to participate in the operation. It was beached in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July and July 25, 1946. 

SHOT DATA: TEST D A T E TYPE DETONATION 

ABLE 1 July 46 23 KT Air Rurst feet) 

RAKER 25 July 46 23 Shallow feet) 

AVERAGE CREW DOSE HISTORY: N/A 

FINAL DISPOSITION: USS LCT-I 175 was sunk by demolition charges at Bikini shortly 

after Shot RAKER. 

134 
TARGET SHIP PARTICIPATION SUMMARY 

SHIP: USS 187 

CREW SIZE: N/A 

MISSION: USS LCT-1187 was a CROSSROADS target ship and arrived at Bikini prior 

to June 30, 1946 to participate in the operation. It was beached in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July 1 and July 25, 1946. 

SHOT DATA: TEST D A T E YIELD TYPE 

ABLE 

BAKER 

I July 46 (0900) 

25 July 46 

23 KT 

23 

Air Burst 

Shallow 

feet) 

feet) 

AVERAGE CREW MEMBER HISTORY: N/A 

FINAL DISPOSITION: LCT-1187 was sunk by demolition charges at Bikini shortly 

after Shot BAKER. 

135 
 

TARGET SHIP PARTICIPATION 

UNMANNED 

SHIP: USS LCT-1237 

CREW SIZE: N/A 

VISION: USS LCT-1237 was a CROSSROADS target ship and arrived at prior 

to June 30, 1946 to participate in the operation. It was beached in the lagoon 

and remained there as one of the 84 target ships for the nuclear test detonations 

that occurred on July 1 and July 25, 1946. 

SHOT DATA: TEST @ A T E YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst feet) 

25 July 46 23 KT Shallow feet) 

AVERAGE CREW HISTORY: N/A 

FINAL DISPOSITION: USS LCT-1237 was sunk by demolition charges at shortly 

after Shot RAKER. 

136 
SECTION A-3 

REMANNED TARGET SHIP 

PARTICIPATION 
 

TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS BLADEN (APA-63) 

CREW SIZE: 

MISSION: USS BLADEN was a CROSSROADS target ship that was remanned and sailed 

away after the nuclear test detonations on July I and July 25, 1946. It had arrived 

at Bikini by 31, 1946 and was anchored in the lagoon where it remained as one 

of the 84 target ships throughout the operation. It departed Bikini on August 20, 

1946 to It eventually steamed to the East Coast where it was 

at Norfolk, VA. on December 26, 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE I July 23 KT Burst feet) 

BAKER 25 July 46 23 KT Shallow Underwater (-90 feet) 

AVERAGE CREW MEMBER DOSE HISTORY 

‘WHILE AT BIKINI 

RECONSTRUCTED 

BADGE 

CREW LOCATION-Hours Aboard DOSE 

ABLE 

July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance of 

miles) 

2 July HENRICO-13 0.001 

4board I 0.001 

3 July-17 July 

July-19 July Evacuated aboard 0.000 

Aboard BLADEN-20 0.000 

20 July-23 July Aboard BLADEN-96 0.000 

BAKER 

24 July-28 July Evacuated aboard 

(Observed Shot BAKER from a distance of 

8 miles) 

29 July Aboard HENRICO-14.5 0.000 

Aboard BLADEN-9.5 0.008 

30 July-20 August 

Total calculated dose received while at Bikini: 0.222 

includes time spent aboard the target ship indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the 

Date unit departed August 1946 (BAKER 

Ship contamination factor when departing Bikini: 3 

(this value is for use with the in Figure A-57) 

PATH REPORT: This report contains the geographic locations that may be of radiological 

significance to vessels within Bikini lagoon. The time is in Day-Hours-Minutes and 

begins on July 1, 1946. days are July (e.g., August 32 July, etc.) Place is the 

grid square within lagoon from Office, Chart 

11854, portions of which are reproduced in Figures 59, 60, 61. 

RADIOLOGICAL REPORT: This report is a day compilation of the reconstructed 

film badge for this unit from the various radiological sources it encountered 

while lagoon. daily total included up to departure from Bikini lagoon. 

A detailed explanation of each source contribution is contained in the report, 

Section 2. 

1 
rx 
 

 

 

 FILM DOSE 

TIME LAGGON TARGET 

WATER 

JUL 2 

JUL 3 

JUL 4 

JUL 24 

JUL 

JUL 26 

JUL 28 

JUL 

JUL 31 

2 

3 

AUG 

7 

AUG 

GUG 9 

A !J 

AUG 11 

AUG 12 

AUG 14 + 2 0 

AUG 17 

19 

*Applies only if the crew was for a 24 hour period. 

140 
141 
-

TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS CONYNGHAM 

CREW SIZE: 109 

USS CONYNGHAM was a CROSSROADS target ship that was remanned and 

sailed away after the nuclear test detonations on July and July 25, 1946. It had 

arrived at Bikini on May 30, 1946 and was anchored in the lagoon where it remained 

as one of the 84 target ships throughout the operation. It departed Bikini on 

August 22, 1946 to Pearl Harbor, and eventually San Francisco. 

It remained at San Francisco until July 1948, when it was scuttled at 

27W. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE I July 46 23 KT Air Burst feet) 

BAKER 25 July 23 KT Shallow Underwater feet) 

AVERAGE CREW MEMBER DOSE HISTORY 

WHILE AT BIKINI 

RECONSTRUCTED 

FILM BADGE 

DATE CREW LOCATION-Hours Aboard DOSE (REM) 

ABLE 

July Evacuated aboard BOTTINEAU 0.000 

(Observed Shot ABLE from a distance of 

25 miles) 

2 July Aboard BOTTINEAU- 13 0.001 

Aboard 0.000 

3 July-17 July Aboard CONYNGHAM-360 0.000 

18 July-19 July Evacuated aboard BOTTINEAU-30 0.000 

Aboard CONYNGHAM-18 0.000 

20 July-23 July Aboard CONYNGHAM-96 0.000 

BAKER 

24 July-31 July Evacuated aboard BOTTINEAU- 181 0.032 

(Observed Shot BAKER from a distance of 

16 miles) 

August-7 August Aboard BOTTINEAU-104 0.073 

Aboard CONYNGHAM-64 0.146 

8 August 22 August Aboard CONYNGHAM-300 0.216 

Aboard ROCKBRIDGE- 0.027 

Total calculated dose received while at Bikini: 0.495 REM 

This reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date departed Bikini: August 22, 1946 (BAKER 28) 

142 
j

-

USS (DD-371) 

READ LEFT 

TOPSIDE 

1 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-50. Shipboard Gamma Intensity vs. Time USS CONYNGHAM (CD-371) 

143 
1

TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS CORTLAND 

CREW SIZE: 89 

MISSION: USS CORTLAND was a CROSSROADS target ship that was remanned and 

sailed away after the nuclear test detonations on July and July 25, 1946. had 

arrived at Bikini 30, 1946 and was anchored in the lagoon where it remained 

as one of the 84 target ships throughout the operation. It departed Bikini on August 

19, 1946 to Norfolk, VA via Kwajalein and Pearl Harbor. It was 

decommissioned at Norfolk on December 30. 1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE I July 46 23 KT Air Burst feet) 

BAKER 25 July 46 23 KT Shallow Underwater feet) 

AVERAGE CREW MEMBER DOSE HISTORY 

WHILE AT BIKINI 

RECONSTRUCTED 

BADGE 

DATE CREW LOCATION-Hours Aboard DOSE (REM) 

ABLE

 July Evacuated aboard ARTEMIS 0.000 

(Observed Shot Able from a distance 

of 15 miles) 

2 July Aboard ART o.oc I 

Aboard CORTLAND-9 0.000 

3 July-17 July Aboard CORTLAND-360 0.000 

18 July-19 July Aboard ARTEMIS-30 0.000 

Aboard CORTLAND-18 0.000 

20 July-23 July Aboard CORTLAND-96 0.000 

BAKER 

24 July-29 July Evacuated aboard ARTEMIS-134 0.000 

(Observed Shot BAKER from a distance 

of 8 miles) 

30 July Aboard ART 0.003 

Aboard CORTLAND-16 0.016 

31 July-19 August Aboard CORTLAND-480 0.208 

Total calculated dose received while at Bikini: 0.228 

This reconstruction includes time spent aboard the target ship indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini: August 19, 1946 (BAKER + 25) 

Ship contamination factor when departing Bikini: 3 

(this value is for use with the nomograph in Figure A-57) 

PATH REPORT: This report contains the geographic locations that may be of radiological 

significance to vessels within Bikini lagoon. The time is in Day-Hours-Minutes and 

begins on July 1, 1946. All days are July (e.g., August 32 July, etc.) Place is the 

grid square within Bikini lagoon from Office, Misc. Chart Number 

11854, portions of which are reproduced in Figures A-58, 59, 60, 61. 

RADIOLOGICAL REPORT: This report is a day-by-day compilation of the reconstructed 

film badge dose for this unit from the various radiological sources it encountered 

while in Bikini lagoon. A daily total is included up to departure from Bikini lagoon. 

A detailed explanation of each source contribution is contained in the basic report, 

Section 2. 
145 


TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS DENTUDA 

CREW SIZE: 58 

MISSION: DENTUDA was a CROSSROADS target ship that was remanned and sailed 

away after the nuclear test detonations on July 1 and July 25, 1946. It had arrived 

at Bikini on 31, 1946 and was anchored in the lagoon where it remained as one 

of the 84 target ships throughout the operation. It departed Bikini on August 22, 

1946 to San Francisco via and Pearl Harbor. It was retained at 

San Francisco for radiological tests until it was decommissioned on December 11, 

1946. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 

BAKER

 July 46 

25 July 46 

23 KT 

23 

Air Burst feet) 

Shallow Underwater feet) 

DATE (1946) 

AVERAGE 

CREW 

CREW MEMBER DOSE HISTORY 

WHILE AT BIKINI 

LOCATION-Hours Aboard 

RECONSTRUCTED 

FILM BADGE 

DOSE 

July 

2 July 

3 July-22 July 

ABLE 

Evacuated aboard BOTTINEAU 

(Observed Shot ABLE from a 

of 25 miles) 

Aboard BOTTINEAU-7.5 

Aboard DENTIJDA-16.5 

Aboard DENTUDA-480 

distance 

0.000 

0.000 

0.004 

0.001 

BAKER 

23 July-30 July Evacuated aboard BOTTINEAU-184 0.012 

(Observed Shot BAKER from a distance 

of 16 miles) 

31 July-9 August Aboard BOTTINEAU- 184.5 0.128 

Aboard FILLMORE 0.001 

Aboard DENTUDA-47.5 0.355 

10 August- 13 August Aboard FILLMORE-59 0.008 

Aboard 0.004 

Aboard DENTUDA-29 0.035 

14 August-22 August Duty section aboard DENTUDA-120 0.097 

Remainer of crew aboard FULTON-96 0.048 

Total calculated dose received while at Bikini: 0.693 REM 

This reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini: August 22, 1946 

148 
-

USS DENTUDA (SS-335) 

READ LEFT 

•

BELOW DECKS 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-5 1. Shipboard Gamma Intensity vs. Time LJSS DENTUDA (SS-335) 

149 
TARGET SHIP SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS FILLMORE (APA-83) 

CREW SIZE: 109 

MISSION: USS FILLMORE was a CROSSROADS target ship that was remanned and sailed 

away after the nuclear test detonations on July I and July 25, 1946. It had arrived 

at Bikini prior to June 30, 1946 and was anchored in the lagoon where it remained as 

one of the 84 target ships throughout the operation. It departed Bikini on August 22, 

1946 to Norfolk, VA via Kwajalein and Pearl Harbor. It was 

decommissioned at Norfolk on January 24, 1947. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 23 KT Air Burst feet) 

BAKER 25 July 46 23 KT Shallow Underwater feet) 

AVERAGE CREW MEMBER DOSE HISTORY 

WHILE AT BIKINI 

RECONSTRUCTED 

FILM BADGE 

DATE CREW LOCATION-Hours Aboard DOSE 

ABLE 

I July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 22 miles) 

2 July Aboard BAYFIELD- 0.00 I 

Aboard FILLMORE-II 0.002 

3 July-17 July Aboard FILLMORE-360 0.000 

July-19 July Evacuated aboard BAYFIELD-30.5 0.000 

Aboard FILLMORE-17.5 0.000 

20 July-23 July Aboard FILLMORE-96 0.000 

BAKER 

24 July-28 July Evacuated aboard BAYFIELD- I I 0.000 

(Observed Shot BAKER from a distance 

of 15 miles) 

29 July Aboard BAYFIELD-8.5 0.000 

Aboard FILLMORE-15.5 0.021 

30 July-22 August Aboard FILLMORE-576 0.185 

Total calculated dose received while at Bikini: 0.209 

This reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini August 22, 1946 (BAKER + 28) 

Ship contamination factor when departing Bikini: 3 

(this value is for use with the nomograph in Figure A-57) 

PATH REPORT: This report contains the geographic locations that may be of radiological 

significance to vessels within Bikini lagoon. The time is in Day-Hours-Minutes and 

begins on July I, 1946. All days are July August = 32 July, etc.) Place is the 

grid square within Bikini lagoon from Office, Misc. Chart Number 

11854, portions of which are reproduced in Figures A-58, 59, 60, 61. 

RADIOLOGICAL REPORT: This report is a day-by-day compilation of the reconstructed 

film badge dose for this unit from the various radiological sources it encountered 

while in Bikini lagoon. A daily total is included up to departure from Bikini lagoon. 

A detailed explanation of each source contribution is contained in the basic report, 

Section 2. 
151 
DATE SHIP 

*Applies only crew was for a 24 hour period. 

152 
 

TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: GENEVA 

CREW SIZE: 115 

GENEVA was a CROSSROADS target ship that was remanned and sailed 

away after the nuclear test detonations on July and July 25, 1946. It had arrived 

at Bikini in 1946 and was anchored in the lagoon where it remained as one of 

the 84 target ships throughout the operation. It departed Bikini on 24, 1946 

to VA via Kwalalein, San Francisco, San Diego, and the Panama 

Canal. was decommissioned at Norfolk on January 1, 1947. 

SHOT DATA: TEST DATE YIELD TYPE DETONATION 

ABLE July 23 KT Burst feet) 

BAKER 25 July 46 23 KT Shallow Underwater feet) 

CREW MEMBER DOSE HISTORY 

WHILE AT BIKINI 

RECONSTRUCTED 

FILM BADGE 

DATE CREW LOCATION-Hours Aboard DOSE 

ABLE 

July Evacuated aboard APPLINC 0.000 

(Observed Shot ABLE from a distance 

of miles) 

2 July Aboard 0.001 

GENEVA-12 3.000 

3 July-17 July GENEVA-360 0.000 

July-19 July Evacuated aboard APPLING-29.5 0.000 

GENEVA-IS.5 0.000 

20 July-23 July GENEVA-96 0.000 

BAKER 

24 July-28 Evacuated aboard APPLINC- 0.000 

(Observed Shot BAKER from a distance 

of miles) 

13 3.000 

GENEVA-l 1 

30 July-24 August GENEVA-624 0.220 

Total calculated dose received while at Bikini: 0.230 REM 

This reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini: August 24, 1946 (BAKER 

Ship contamination factor when departing Bikini: 3 

(this value is for use with the nomograph in Figure A-571 

PATH REPORT: This report contains the geographic locations that may be of radiological 

significance to vessels within Bikini lagoon. The time is in Day-Hours-Minutes and 

begins on July I, 1946. days are July (e.g., I August = 32 July, etc.) Place is the 

grid square within Bikini lagoon from Office, MISC. Chart Number 

11354, portions of which are reproduced in Figures A-58, 59, 60, 61. 

REPORT: This report is a day-by-day compilation of the reconstructed 

film badge dose for this unit from the various radiological sources it encountered 

while in Bikini lagoon. A daily total is included up to departure from Bikini lagoon. 

4 detailed explanation of each source contribution is contained in the basic report, 

Section 2. 

153 
154 
 D D D 4 + 4 4 

m 

0 
 

-

-

TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS LCI-329 

CREW SIZE: 16 

MISSION: USS LCI-329 was a target ship and arrived at Bikini prior to 

June 30, 1946 to prepare for the operation. It was anchored in the lagoon and 

remained there are one of the 84 target ships for the nuclear test detonations that 

occurred on July and July 25, 1946. After Shot BAKER, the LCI-329 was 

remanned and steamed to where it was placed in caretaker status on 

February 22, 1947. It was finally sunk in deep water off on March 16, 

1948. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 

BAKER 

July 46 

25 July 46 

23 KT 

23 KT 

Air Burst 

Shallow Underwater 

feet) 

feet) 

DATE 

AVERAGE CREW 

CREW LOCATIOY

MBER DOSE HISTORY 

RECONSTRUCTED 

FILM BADGE 

Hours Aboard DOSE 

ABLE 

30 June 1 July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 22 miles) 

2 July 4board BAYFIELD- 18 0.001 

Aboard LCI-329-6 0.001 

3 July-17 July Aboard LCI-329-360 

13 July-19 July Evacuated aboard BAYFIELD- 0.000 

Aboard LCI-329-I 9 0.000 

20 July-23 July Aboard LCI-329-96 0.000 

BAKER 

24 July-31 July Evacuated aboard 0.024 

(Observed Shot BAKER from a distance 

of 15 miles) 

1 Aboard BAYFIELDAboard ROCKBRIDGE 0.138 

10 August ROCKBRIDGE- 11.5 0.007 

LCI-329-12.5 

1 I August-24 August LCI-329-336 

Total calculated dose while at Bikini: 

This reconstruction includes spent aboard the target ship (as indicated) after the 

detonations and prior to the that the entire crew returned to live aboard the ship. 

Date unit departed Bikini: 24, 1946 (BAKER 
- 

TOPSIDE, BELOW DECKS 

AND AMIDSHIPS 

READ 

1 100 30 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-52. Shipboard Gamma Intensity vs. Time 

157 
 

TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS 

CREW SIZE: 22 

MISSION: USS was a CROSSROADS target ship that was remanned and sailed 

away after the nuclear test detonations on July and July 25, 1946. It had arrived 

at Bikini prior to June 30, 1946 and was anchored in the lagoon where it remained as 

one of the 84 target ships throughout the operation. It departed Bikini on August 24, 

1946 to Kwajalein where it was retained as a patrol vessel until June 1948. 

It was then sailed to San Francisco where it was stripped and disposed as hulk about 

January 1949. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 

BAKER

1 July 46 

25 July 46 (0835) 

23 KT 

23 KT 

Air Burst 

Shallow U

 ft) 

nderwater 

AVERAGE CREW MEMBER DOSE 

WHILE AT BIKINI 

HISTORY 

RECONSTRUCTED 

FILM BADGE 

DATE 1946) CREW LOCATION-Hours Aboard DOSE (REM) 

ABLE 

1 July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance of 

22 miles) 

2 July Aboard BAYFIELD-16.5 0.001 

Aboard 549-7.5 0.000 

3 July-17 July Aboard 549-360 0.000 

18 July-19 July Evacuated aboard BAYFIELD- 1 0.000 

Aboard 0.000 

20 July-23 July Aboard L 549-96 0.000 

BAKER 

24 July-31 July Evacuated aboard BAYFIELD- 183 0.024 

(Observed Shot BAKER from a distance 

of 15 miles) 

1 August-9 August Aboard BAYFIELD-16.5 0.012 

Aboard ROCKBRIDGE 0.137 

10 August Aboard ROCKBRIDGE- 0.006 

Aboard 0.002 

11 August-24 August Aboard 0.023 

Total calculated dose received while at Bikini: 0.205 REM 

This reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini: August 24, 1946 (BAKER + 30) 

158 
 

 

 

 

: 1

8 1

1 ;

-

AND AMIDSHIPS : :

 : 

READ RIGHT 

I 

TOPSIDE, BELOW DECKS 

D AMIDSHIPS 

A BELOW DECKS 

AMIDSHIPS 

A

1 I 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Baker. The curves are sometimes

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-53. Shipboard Gamma Intensity vs. Time LJSS 

159 
TARGET SHIP SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS 

CREW SIZE: 16 

MISSION: was a CROSSROADS target that was remanned and sailed 

away after the nuclear test detonations on July and July 25, 1946. It had arrived 

at Bikini prior to June 30, 1946 and was beached on Bikini Island where it remained 

as one of the 84 target ships throughout the operation. It departed Bikini on 

September 4, 1946 to Kwajalein where it was retained as patrol vessel. It 

participated in a resurvey of Bikini in July 1947 and was sailed to San Francisco for 

disposal about June 1948. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 

BAKER 25 July 46 

23 KT 

23 KT 

Air Burst feet) 

Shallow Underwater feet) 

AVERAGE CREW MEMBER DOSE HISTORY 

WHILE AT BIKINI 

RECONSTRUCTED 

FILM BADGE 

DATE 1946) CREW LOCATION-Hours Aboard DOSE 

ABLE 

I July-2 July Evacuated aboard 0.001 

(Observed Shot ABLE from a distance 

of 22 

3 July Aboard BAYFIELD- 0.000 

Aboard 0.000 

July-24 July Aboard BAYFIELD- 0.000 

BAKER 

25 July-31 July Evacuated aboard BAYFIELD- 0.024 

(Observed Shot BAKER from a distance 

of 15 miles) 

1 Aboard BAYFIELD- 0.008 

Aboard 0.016 

2 August-4 September Aboard 0.595 

Total calculated dose received while at Bikini: 0.644 REM 

This reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini: September 4, 1946 (BAKER 4 

Ship contamination factor when departing Bikini: 5 

(this value is for use with the nomograph in Figure A-57) 

PATH REPORT: This report contains the geographic locations that may be of radiological 

significance to vessels within Bikini lagoon. The time is in Day-Hours-Minutes and 

begins on July 1, 1946. All days are July (e.g., August 32 July, etc.) Place is the 

grid square within Bikini lagoon from Office, Misc. Chart Number 

11854, portions of which are reproduced in Figures A-58, 59, 60, 61. 

RADIOLOGICAL REPORT: This report is a day-by-day compilation of the reconstructed 

film badge dose for this unit from the various radiological sources it encountered 

while in Bikini lagoon. A daily total is included up to departure from Bikini lagoon. 

A detailed explanation of each source contribution is contained in the basic report, 

Section 2. 

 only f the crew was for a 24 hour period. 

162 
TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS NIAGARA (APA-87) 

CREW SIZE: 271 

MISSION: USS NIAGARA was a CROSSROADS target ship that was remanned and sailed 

away after the nuclear test detonations on July I and July 25, 1946. It had arrived 

at Bikini in 31, 1946 and was anchored in the lagoon where it remained as one 

of the 84 target ships throughout the operation. It departed Bikini on August 21, 

1946 to Norfolk, VA via Pearl Harbor, and San Francisco. It was 

used to test the effects of conventional explosives and then sold as scrap in 1950. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 23 KT Air Burst feet) 

BAKER 25 July 46 (0835) 23 KT Shallow Underwater feet) 

AVERAGE CREW MEMBER DOSE HISTORY 

WHILE AT BIKINI 

RECONSTRUCTED 

FILM BADGE 

DATE CREW LOCATION-Hours Aboard DOSE 

ABLE 

I July Evacuated aboard 0.000 

(Observed Shot ABLE from a distance 

of 22 miles) 

July Aboard 0.000 

Aboard NIAGARA-14 0.000 

3 July-17 July Aboard NIAGARA-360 0.000 

18 July-19 July Evacuated aboard BAYFIELDAboard NIAGARA-18 0.000 

20 July-23 July NIAGARA-96 0.000 

BAKER 

24 July-28 July Evacuated aboard BAYFIELD- I IO 0.000 

(Observed Shot BAKER from a distance 

of miles) 

29 July Aboard BAYFIELD- 0.000 

Aboard NIAGARA-16 0.01 I 

30 July-21 August Aboard NIAGARA-552 0.186 

Total calculated dose received while at Bikini: 0.197 REM 

This reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini August 21, 1946 (BAKER 

Ship contamination factor when departing Bikini: 3 

(this value is for use with the nomograph in Figure A-57) 

PATH REPORT: This report contains the geographic locations that may be of radiological 

significance to vessels within Bikini lagoon. The time is in Day-Hours-Minutes and 

begins on July I, 1946. All days are July (e.g., August 32 July, etc.) Place is the 

grid square within Bikini lagoon from Office, Misc. Chart Number 

11854, portions of which are reproduced in Figures A-58, 59, 60, 61. 

RADIOLOGICAL REPORT: This report is a day-by-day compilation of the reconstructed 

film badge dose for this unit from the various radiological sources it encountered 

while in Bikini lagoon. A daily total is included up to departure from Bikini lagoon. 

A detailed explanation of each source contribution is contained in the basic report, 

Section 2. 
m 

. -

1:; 

m 

0 
 

 

--------------------------------------------------------------

 NIAGARA CALCULATED FILM BADGE DOSE 

DATE TARGET SHIP 

TOTAL 

1 

3 

4 

JUL 5 24 

25 

JUL 27 

JUL 26 

17 

JUL 

JUL i4 

AUG 2 

5 

AUG 4 4 

AUG 5 4 

4 

7 ij 

AUG 14 

4 

GUG 12 

11 11 

? 

AUG 14 8 

AUG 7 

AUG 17 

18 5 

5 

5 

AUG 4 

*Applies only if the crew was for a 24 hour period. 

165 
TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS PARCHE 

CREW SIZE: 61 

MISSION: USS PARCHE was a CROSSROADS target ship that was remanned and sailed 

away after the nuclear test detonations on July 1 and July 25, 1946. It had arrived 

at Bikini prior to June 30, 1946 and was anchored in the lagoon where it remained as 

one of the 84 target ships throughout the operation. It departed Bikini on August 22, 

1946 to Mare Island via and Pearl Harbor. It arrived at Mare 

Island on October 14, 1946 and reported to the 19th Fleet. PARCHE was eventually 

sold for scrap in July 1970. 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE 1 July 46 (0900) 23 KT Air Burst feet) 

BAKER 25 July 46 23 KT Shallow Underwater feet) 

AVERAGE CREW MEMBER DOSE HISTORY 

WHILE AT BIKINI 

RECONSTRUCTED 

FILM BADGE 

DATE CREW LOCATION-Hours Aboard 

ABLE 

1 July Evacuated aboard BOTTINEAU 0.000 

(Observed Shot ABLE from a distance 

of 25 miles) 

2 July Aboard BOTTINEAU- 12 0.001 

Aboard PARCHE-12 0.003 

3 July-24 July Aboard PARCHE-528 0.002 

BAKER 

25 July-5 August Evacuated aboard BOTTINEAU-288 0.125 

(Observed Shot BAKER from a distance of 

16 miles)

6 August- 7 August Aboard BOTTINEAU-43.5 0.017 

Aboard PARCHE-4.5 0.219 

8 August-22 August Aboard FILLMORE 0.062 

Aboard PARCHE-81.5 0.668 

Total calculated dose received while at Bikini: 1.097 REM 

reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini: August 22, 1946 (BAKER t 28) 

166 
 I 

! 

1.0 

a

BELOW DECKS 

I I

 : 

0.1 

1 10 I SEPT 

100 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves 

:

1

I !

-

i

-

(SS-384) 

0.1 

. 

. .oo 

1000 

for 

topside amidships, and below decks locations on target ships are discussed in detail in

sections 2.4 and 4.0 of the basic report. The data points and average curve are

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. 

individual curves for each location. 

In some cases the data does not discriminate between 

Figure A-54. Shipboard Gamma Intensity vs. Time USS PARCHE (SS-384) 

167 
 

TARGET SHIP PARTICIPATION SUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS 

CREW SIZE: 58 

MISSION: was a CROSSROADS target ship that was remanned and sailed 

away after the nuclear test detonations on July 1 and July 25, 1946. It had arrived 

at Bikini on May 30, 1946 and was anchored in the lagoon where it remained as one 

of the 84 target ships throughout the operation. It departed Bikini on August 22, 

1946 to San Francisco via and Pearl Harbor. It was eventually 

sunk as a target on September 11, 1948 by VC-22 at 

SHOT DATA: TEST DATE (TIME) YIELD TYPE DETONATION 

ABLE July 46 23 KT Air Burst feet) 

BAKER 25 July 46 23 KT Shallow Underwater feet) 

AVERAGE CREW MEMBER DOSE HISTORY 

WHILE AT BIKINI 

RECONSTRUCTED 

FILM BADGE 

DATE CREW LOCATION-Hours Aboard DOSE 

ABLE 

1 July Evacuated aboard BOTTINEAU 0.000 

(Observed Shot ABLE from a distance 

of 25 miles) 

2 July Aboard BOTTINEAU-12 0.001 

Aboard SEARAVEN- 0.004 

3 July-21 July Aboard SEARAVEN- 0.001 

BAKER 

22 July-3 August Evacuated aboard BOTTINEAU-276 0.098 

(Observed Shot BAKER from a distance 

of 16 miles) 

4 August -9 August Aboard BOTTINEAU- 106 0.054 

Aboard FILLMORE 0.001 

Aboard SEARAVEN- 0.492 

10 August -22 August Aboard 0.049 

Aboard SEARAVEN-66.5 0.196 

Total calculated dose received while at Bikini: 0.896 REM 

This reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini: August 22, 1946 (BAKER t 28) 

168 
/ I

-

USS (SS-196) 

TOPSIDE 

AMIDSHIPS 

A 

1 I SEM 100 10 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are 

presented as a function of time in days after Shot Raker. The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-55. Shipboard Gamma Intensity vs. Time LJSS (SS-196) 

169 
TARCETSHIPPARTICIPATIONSUMMARY 

REMANNED AFTER SHOT BAKER 

SHIP: USS TUNA 

CREW SIZE: 57 

MISSION: USS TUNA was a CROSSROADS target ship that was remanned and sailed away 

after the nuclear detonations on July 1 and July 25, 1946. It had arrived at Bikini 

prior to June 30, 1946 and was anchored in the lagoon where it remained as one of 

the 84 target ships throughout the operation. It departed Bikini on August 22, 1946 

to the West Coast via and Pearl Harbor. It was retained 

at MINSY for radiological studies until it was sunk off the West Coast at 

on September 4, 1948. 

SHOT DATA: TEST DATE YIELD TYPE DETONATION 

ABLE 1 July 46 23 KT Air Burst feet) 

BAKER 25 July 46 23 KT Shallow Underwater feet) 

AVERAGE CREW DOSE HISTORY 

WHILE AT BIKINI 

RECONSTRUCTED 

FILM BADGE 

DATE CREW LOCATION-Hours Aboard 

ABLE 

July Evacuated aboard BOTTINEAU 0.000 

(Observed Shot ABLE from a distance 

of 25 miles) 

2 July Aboard BOTTINEAU- 12 0.001 

Aboard TUNA-12 0.004 

3 July-23 July Aboard TUNA-504 0.001 

BAKER 

24 July-31 July Evacuated aboard BOTTINEAU- 178 0.032 

(Observed Shot BAKER from a distance 

of 16 miles) 

1 August-9 August Aboard BOTTINEAU-151.5 0.098 

Aboard TUNA-64.5 0.955 

10 August -22 August Aboard FILLMORE 0.039 

Aboard TUNA-125.5 0.359 

Total calculated dose received while at Bikini: 1.489 REM 

This reconstruction includes time spent aboard the target ship (as indicated) after the 

detonations and prior to the time that the entire crew returned to live aboard the ship. 

Date unit departed Bikini: August 22, 1946 (BAKER 28) 

170 
 

 

1

-

 TUNA (SS-203) 

t . . . . . 

I ! 

TOPSIDE 

BELOW DECKS 

1 I 100 1000 

Days After BAKER 

SHIPBOARD GAMMA INTENSITY CURVES: The average gamma intensity curves for 

topside amidships, and below decks locations on target ships are discussed in detail in 

sections 2.4 and 4.0 of the basic report. The data points and average curve are

presented as a function of time in days after Shot The curves are sometimes 

shown in a folded fashion and care should be exercised when reading the proper 

intensity scale. In some cases the available data does not discriminate between 

individual curves for each location. 

Figure A-56. Shipboard Gamma Intensity vs. Time USS TUNA (SS-203) 

171 
Ship departed Bikini Atoll 

(t*= 10 days a 

Individual ship o 

= 90 days af 

on 4 Aug 1946 

BAKER) 

23 1946 

'ter BAKER) 

rting Bikini = 20 

al axis at 90. 

5.6 (by 

Ship contamination factor when depa 

Enter horizontal axis at 10, vertic 

Value of function at intersection i 

interpolation). Therefore total fi 

•• 112 mrem. 

lm badge dose = 

•• t must be the BAKER + date when the ship departed 

Bikini, otherwise the calculation will be in err 

20 30 50 100 

(days after BAKER detonation) 

Figure A-57. Post-Bikini Dose Nomograph 

172 
 

 

 

.

- ’

-

(maximum extent of 

prior to 0855 . . 

Figure A-58. Shot ABLE Red R/day) 

173 
- - -

--. I.- -----r---

---m-mA line 1900 hours, 1 July 46 (maximum extent of blue line) 

line 0600 hours, 2 July 46 

Blue line eliminated 1008 hours, 2 46 

, I , 

 

 

 

/ / 1 /

/ 1

/ /

/ a ! /

-

-

I 1 I I I I I I

Figure A-59. Shot ABLE Blue Lines R/day) 

174 
 

 

 

 

 

. .

i

-

I I

1 ) / 1 1 I I I ' 1 /

I ” - - -

 line 1230 hours, 26 July 46 

line 1030 hours, 27 July 46 

Red line eliminated 1455 hours, 28 July 46 

I ! I 

I , , I I . 

Figure A-60. Shot BAKER Red Lines R/day) 

175 
 

 

 

!

- '

1 : -

-

/ -

-

-

- -I-.- -.---z>

line 1230 hours, 26 July 

line 1030 hours, 27 July 46 

line 1430 hours, 28 46 

line 1230 hours, 29 July 46 

line 0830 hours, 30 July 46 

Blue line eliminated 0959 hours, 30 46 

Figure A-61. Shot BAKER Blue Lines R/day) 

176 
Table A-l. Calendar Date Conversion for Operation CROSSROADS 

Calendar July BAKER+ Calendar July RAKER+ Calendar RAKER+ 

Date Date Date Date Date Date Date Date 

I, 1946 01 32 7 Sept 1 38 

2 02 2 33 8 5 42 

3 03 3 34 9 10 47 

4 04 4 35 10 15 52 

5 05 5 36 11 20 57 

6 06 6 37 12 25 62 

7 07 7 38 13 30 67 

8 08 8 39 14 

9 09 9 40 15 1 68 

10 10 41 16 5 72 

11 11 11 42 17 10 77 

12 12 12 43 18 15 82 

13 13 13 44 19 20 87 

14 14 14 45 20 25 92 

15 15 15 46 21 31 98 

16 16 16 47 22 

17 17 17 48 23 Nov 1 99 

18 18 18 49 23 5 103 

19 19 19 50 25 10 108 

20 20 20 51 26 15 113 

21 21 21 52 27 20 118 

22 22 22 53 28 25 123 

23 23 23 54 29 30 128 

24 29 24 55 30 

25 25 0 25 56 31 1 129 

26 26 1 26 57 32 5 133 

27 27 2 27 58 33 10 138 

28 28 3 28 59 34 15 143 

29 29 4 29 60 35 20 148 

30 30 5 30 61 36 25 153 

31 31 6 31 62 37 31 159 

Jan 1, 1947 160 Feb 1, 1947 191 Mar 1, 1947 219 

5 164 5 195 5 223 

10 169 10 200 10 228 

15 174 15 205 15 233 

20 179 20 210 20 238 

25 184 25 215 25 243 

31 190 28 218 31 249 

177 

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184