AUTHORITY - DTICof the weather deck cargo hatch cover battens forward and 95% aift are dislodged....

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CON F4UNTIAL

Nj BUREAU OF HPS GRO UP

iITECHNICAL I NSPEC

(INI C

jAFA iv' c s ED• WA& 149

t, U-.S.S. CATRON.(.APA71)..

€•' •-'ITEST BAKERLj

S -UJ. S. GOVERNMENT -AGENCIES MAY 06TAIN COPIES OF THIS REPORT DIRECTLYIXROM DDG. OTHER QUALIFIED DDC USERS SHALL REQUEST THROUGH

-• LX.- DireatorDojt~nsg Atoqmia -suiDort Azeno2

... , Wai•hington, D. C. 20301.

"CON FDENTIAL!.// OPERATION CROSSROADS S~curity Inf ormatiola

SAL~DIRECTOR OF SHIP MATERIJI

JOINT TASK FORCE OL

: ' - - . ~ ~" I"~'•. '

I , giudeat 1i Tw "ru••,.u

L : .. .. ,.•,, , , ,,., • •-,•:••!•,•,, ;'•~i,•:A N •

BUTREAU OF SHIPS GROUP

TECHNICAL INSPECTION REPORT

& GOVERNMErr AGENCIES MAY OBTAIN COPIES OF THIS REPORT DIR.cfryFNO( DOC. OTHER QUALIFIED DDC USERS SHALL RE3UEST THROUCHDlreotorDefense Atomic SUpport Ageno,

Washington, D. C. 20301

APPROVE~D: F~t

Captain, U.S.N.

SET U.S.S. CATRON (APA71)

"Page 1 of 46 Pages

Dowa gsaded at 12 e-lrsiam e

TABLE OF CONTENTS

PAGE NO.

Ship Characteristics Sheet ---------------- 3

Midship Section ---------------------------- 4

Overall Summary -------------------- ---- *---. 5

Hull Technical Inspection Report;(Pection I) - ------ 12

'Machinery Technical Inspection Reportectlon II) - - 18

"Electrical Technical Inspection Reportý ectoa nI) 25

"-Photowgraphic Section -V~tion IV)- -- -- -- --- - ----- 33

Ships Measurement Diagram .(Appendix) - -------- 42

Commanding Officers Report k•p"ndtx) --------- 45

U.S.S. CATRON (APA71)

Page 2 of 46 Pages

U.S.S. CATRON (APA 71)

SHIP CHARACTERISTICS

Building Yard: Consolidated Steel Corp.; Wilmington,California.

Commissioned: 28 November 1944.

HULL

Length Overall: 426 feet 0 inches.Length on Waterline: 400 feet 0 inches.Beam (extreme): 58 feet 0 inches.Depth (molded to upper deck): 37 feet 0 inches.Drafts at time of test: Fwd. 9 feet 10 inches.

Aft. 17 feet 1 inch.Limiting displacement: 7,080 tons.Displacement at time of test: 5,839 tons.

MAIN PROPULSION PLANT

Main Engines: Two sets of Westinghouse steam tur-bines, directly connected to Westinghouse main gen-erators. Two main shaft motors.Main Condensers: Two are installed in shipBoilers: Two Babcock and Wilcox boilers are in-stalled in ship. 450 psi gauge - 750° F.Propellers: Two are installed.Main Shafts: Two are installed in ship.Ships Service Generators: Five are installed inship.Two.- 250 KW. - 450 V. - A.C.One - 150 KW. - 450 V. - A.C.Two - 100 KW. - 120/240 V. - D.C.

"6,RET USS CATRON (APA 71)

Page 3 of 46 Pages

I

""f/ o xO ' x 4 4x t o

ONL Y

I_____

WA Y OF 5r.4AvCm1,qV.5

MIDSHIP SECTIONTEST B

!mLrT U.-.8. CATRON (APAT7)

PABE 4 OF .475


OVERALL SUMMARY

I. Target Condition After Te.;t.

(a) Drafts after test; general areas of flooding, sources.

Before Test Draft Draft ListForward 9' 10" Aft 17' 1" 00

After Test Forward 10' 0" Aft 18' 0" 1/20 port

The qhaft alley bilges and starboard shaft alley wereflooded througl the stern tubes. The after machinery space floodedfrom the starboard shaft alley through the bulkhead gland. The forwardmachinery space flooded through a broken 1/2" salt water cooling lineto the main circulator lube oil cooler. The auxiliary machinery spaceflooded to a depth of about six feet through the starboard shaft glandfrom the forward machinery space.

(b) Structural damage.

HULL

No structural damage was observed.

MACHINERY

No comment,

ELECTRICAL

Not observed.

(c) Other damage.

HULL

Not observed.

SECRET U.S.S. CATRON (APA 71)

Page 5 of 46 Pages

MACHINERY

Machinery in the forward engine room and auxiliarymachinery room was damaged by flooding. No other damage tomachinery was found by a careful visual inspection.

ELECTRICAL

Flooding of equipment in the two machinery spaces wasthe only damage sustained by electrical equipment.

II. Forces Evidenced and Effects Noted.

(a) Heat.

HULL

None.

MACHINERY

No evidence.

ELECTRICAL

No effects of heat were noted.

(b) Fires and explosions.

HULL

None.

MACfi-NERY

No evidence.

E LECTRICAL

There were no fires nor explosions on the vessel.

SECRET U.SSS. CATRON (APA71)

Page 6 of 46 Pages

(c) Shock.

HULL

Slight shock effect is indicated by shaking down of asbes-tos pipe insulation in the after machinery s, ace. About 65% of theweather deck-cargo hatch cover battens forward and 95% aft aredislodged. Two pontoon covers on the main deck cargo hatch are dis-lodged. No hatch battens or pontoons are damaged. This disarrange-ment may have been caused by rapid rolling of the ship.

MACHINERY

The CATRON received a moderate underwater shock whichbroke a small salt water cooling line in the forward engine room.

ELECTRICAL

No effects of shock were found in any electrical equipment.

(d) Pressure.

HULL

No effects noted.

MACHINERY

No evidence.

ELECTRICAL

No effects of pressure were noted in any electrical equip-ment.

(e) Effects peculiar to the Atomic Bomb.

HULL

None.

SECRET U.S.S. CATRON (APA71)

Page 7 of 46 Pages

MACHINERY

An underwater shock of such magnitude as to cause damageat so great a distance from an explosion is apparently peculiar to theAtom Bomb.

ELECTRICAL

No effects, other than the high radioactivity, were foundas bein peculiar to the Atom Bomb.

III. Results of Test on Target.

(a) Effect on machinery, electrical, and ship control.

HULL

No comment.

MACHINERY

All machinery in the forward engine room and auxiliarymachinery room is inoperable because of flooding. This could havebeen easily controlled if the crew had been aboard. In this case, itis not believed that the test would have had any effect on machineryor ship control. The steering gear is apparently undamaged.NOTE: No machinery on this vessel was operated after Test A.

ELECTRICAL

Hall of the electric propulsion would be lost through theflooding of the forward main motor and forward auxiliaries. Shipcontrol would not be affected.

(b) Effect on gunnery and fire control.

HULL

None.

SECRET I S.S. CATRON (APA71)

Page 8 of 46 Pages

MACHINERY

No comment.

ELECTRICAL

There would be no effect on gunnery and fire control dueto electrical damage.

(c) Effect on watertight integrity and stability.

HULL

Flooding occurred because of failure of a badly corrodedsalt water line and a leaky stern tube. This condition could have beencorrected and the extensive flooding prevented had the ship beenmanned.

MACHINERY

No comment.

ELECTRICAL

There would be no effect on watertight integrity nor onstability due to electrical damage.

(d) Effect on personnel and habitability.

HULL

Except for the effects of radioactivity, it is consideredthat personnel and habitability would not have been affected by thetest.

MACHINERY

It is not believed that the test would have had any effect onpersonnel or habitability except for possible effects of radioactivity.


Page 9 of 46 Pages

ELECTRICAL

Electrical damage would have had no effect on personnel.The habitability of the ship would have been reduced by the floodingout of all evaporator pump motors.

(e) Effects on fighting efficiency.

HULL

Flooding of some engineering spaces reduced the fightingefficiency considerably but this would have been prevented had theship been manned.

MACMINERY

The flooding reduced maximum speed to about 6 knots andleft the ship without an evapcrating plant. If the crew had been aboard,the flooding could have been easily controlled and the test would havehad no effect on military efficiency as far as machinery is concerned.

ELECTRICAL

The fighting efficiency of the ship would have been greatlyreduced due to the loss of one propulsion motor and auxiliaries.

IV. General Summary of Observers' Impressions and Conclusions.

HULL

No comment.

MACHINERY

The CATRON was outside the effective range of seriousmechanical damage from this form of attack in Test B.

ELECTRICAL

The damage as found would have limited the effectiveness of

SECRET U.SoS. CATRON (APA71)

Page 10 of 46 Pages

the ship due to the loss of I alf of the propulsion. Had a ship's forcebeen aboard at the time of the blast, the flooding would have beencontrolled and no damage to electrical shipment would have occurred.

The inspection furnishing the material for tis report wasmade very quickly due to high radioactivity.

V. Preliminary Recommendation.

HULL

None.

MACHINERY

None.

ELECTRICAL

Although flooding of electrical gear occurred, the floodingwould have been controlled under normal conditions; and therefore norecommendations are warranted.

SECFET U.S.S. CATRON (APA71)

Page 11 of 46 Pages


SECTION I - HULL

GENERAL SUMMARY OF HULL DAMAGE

I. Target Condition After Test.

(a) Drafts after test, general areas of flooding, sources.

Draft Draft List

Before Test Forward 9' - 10" Aft 17' - 1" Q0

After Test Forward 10'- 0" Aft 18' - 0" 1/20 port

The shaft alley bilges and starboard shaft alley wereflooded through the stern tubes. The after machinery space floodedfrom the starboard shaft alley through the bulkhead gland. The forwardmachinery space flooded through a broken 1/2" salt water cooling lineto the main circulator lub oil cooler. The source of flooding in theauxiliary machinery space and S.D. Storeroom is unknown. This flood-ing probably came from the forward machinery space through the star-board shaft gland.


No structural damage was observed.

()Other darnaget

Not observed.


(a).Heat.

None.

SECRET USS CATRON (APA71)

.Page 12 of 46 Pages

(b) Fires and Explosions.

None.

(c) Shock.

Slight shock effect is indicated by shaking down ofasbestos pipe insulation in the after machinery space. About 65%of the weather deck cargo hatch cover battens forward and 95% aiftare dislodged. Two pontoon covers on the main deck cargo hatchare dislodged. No hatch battens or pontoons are damaged. This dis-arrangement may have been caused by rapid rolling of the ship.

(d) Pressure.

No effects noted.

(e) Effects peculiar to the Atomic Bomb.

None.

Mn. Results of Test on Target.

(a) Effect on machinery, electrical, and ship control.

The steering engine is apparently undamaged. Machineryin the for~ward and auxiliary machinery: paces is inoperable as theresult o- iooding.


None.


Flooding occurred because of a failur~e of a badly corrodedsalt water line and a leaky stern tube. This condition could have beencorrected and the extensive flooding prevented had the ship been manned.


Page 13 of 46 Pages


Except fdr the effects of radioactivity, it i& consideredthat personnel and habitability would not have been affected by thetest.

(e) Effect on fighting efficiency.

Flooding of some engineering spaces reduced the fightingefficiency considerably but this would have been prevented ha( the shipbeen manned.

IV. General Summary of Observers' Impressions and Conclusions.

No comment.

V. Preliminary Recommendations.

None.

VI. Instructions for loading the vessel specified the following:

ITEM LOADING

Fuel oil 50%

Diesel oil 50%

Ammunit )n 50%

Potable and reserve feed water 95%

Salt water ballast 620 tons

Details of the actual quantities of the various itemsaboard are indluded in Report 7, Stability Inspection Report, sub-mitted by the ship's force in accordance with "Instructions toTarget Vessels for Tests and Observations by "'Ships Force" issuedby the Director of Ships Material. This report is available for in-spection in the Bureau of Ships Crossroads Files.


Page 14 of 46 Pages

DETAILED DESCRIPTION OF HULL DAMAGE

A. General Description of Hull Damage.

A 1/2 inch s& a~ter line broke and permitted floodingof the forward machinery e.Other engineering sp ces and astoreroom partially flooded dop to progressive flooding and sterntube leakage. There Is little other damage attributable to the test.General views of the exterior of the ship after test B are shown onpages 34 and 35.

B. Superstructure.

No damage.

C. Turrets, Guns and Directors.

No damage.

D. Torpedo Mounts,, Depth Charge Gear.

Not applicable.

E. Weather Deck.

65% of the cargo hatch battens forward and 95%, aft,were dislodged and either scattered on the upper deck or droppedthrough to the main deck. No hatch battens are damaged. (photos2961-9 & 2960-2; pages 37 and 36.

F. Exterior Hull-

A hole approximately 2 square inches in area is punchedthrough the starboard shell in C-202L at frame 138 1/4, 6 inchies be-low the main deck. A hole approximately 12 square inches In area ispunched through the starboard shell at frame 75, 2 feet above the fire-room flat. This damage was probably caused by a tug during decon-tamination operations.

SECRET U~SSCATRON (APA71)

Page 1.5 of 46 Pages

G. Interior Compartments (Above w.1.).

Two pontoon covers on the main deck cargo hatch aredislodged. No damage was observed.

H. Armor Decks and Miscellaneous Armor.

Not applicable.

I. Interior Compartments (below w.l.).

No known damage. Complete inspection could not bemade because of flooding. A tabulation of locations and recordingsof scratch gages installed in the machinery spaces is included asan appendix.

J. Underwater Hull.

No known damage.

K. Tanks.

No known damage. Complete inspection could not bemade because of flooding.

L. Flooding.

The primary causes of flooding were a broken 1/2 inchcooling line and the stern tubes. Secondary causes were leakingshaft glands.

Draft Draft List

Before Test fwd. 9' - 10" Aft. 17' - 1" 00

After Test fwd. 10' - 0" Aft. 18' - 0" 1/20 port.

The forward machinery space (photos 1930-9 and 10;pages 28 and 39 ) flooded to about 4 1/2 feet below the uppergrating level from a broken 1/2 inch salt water cooling line to the


1-toge 16 of 46 Pages

main circulator lube oil cooler. The auxiliary machinery space andS.D. Storeroom, B-2-1AW, flooded to within 2 1/2 feet of the operatingplatform and overhead at the 2nd platform level from an unknownsource but probably from the forward machinery space through thesta.rboard shaft gland (photo 1930-11, page 40 ) m"he after machineryspace had 2 inches of water which came through tle starboard shaftgland. The shaft alley bilges were flooded through the stern tubes.The starboard alley had 3 inches of water on deck at the forward end.

All flooding could have been controlled by ships force.

M. Ventilation.

No damage.

N. Ship Control.

No damage.

0. Fire Control.

No damage.

P. Ammunition Behavior.

No damage.

Q. Ammunition Handling.

No damage.

R. Strength.

No damage.

S. Miscellaneous.

No damage.


Page 17 of 46 Pages


SECTION II - MACHINERY

GENERAL SMMIARY OF MACHINERY DAMAGE


(a) Drafts after test; list; general areas of flooding,sources.

The forward engine room and the auxiliary machin-ery room were flooded to the outside water line. The water enteredthrough a broken salt water cooling line in the engine room. Thisflooding could have been controlled if the crew had been aboard.


No comment.

(c) Other damage.

Machinery in the forward engine room and aux-illary machinery room was damaged by flooding. No other damageto machinery was found by a careful visual inspection.


(a) Heat.

No evidence.


No evidence.

(c) Shock.

The CATRON received a moderate underwatershock which broke a small salt water cooling line in the forwardengdne room.


Page 18of 46Pages

(d) Pressure.

No evidence.

(e) Any effects apparently peculiar to the atom bomb.

Any inderwater shock of such magnitude as tocause damage at so great a distance from an explosion Is appar-ently peculiar to the atom bomb.

IIU. Effects of Damage.

(a) Effect on machinery and ship control.

All machinery in the forward engine room andauxiliary machinery room Is inoperable because of flooding. Thiscould have been easily controlled if tne crew had been aboard. Inthis case, it is not believed that the test would have had anyeffect on machinery or ship control.

Note: No machinery on this vessel was oper-

ated after Test A.


No comment.


No comment.


It Is not believed that the test would have hadany effect on personnel or habitability except for possible effects ofradicactivi ty.

(e) Total effect on fighting efficiency.


Page 19 of 46 Pages

The flooding reduced maximwn speed to about 6knots and left the ship without an evaporating plant. If the crew hadbeen aboard, the flooding could have been easily controlled and thetest would have had no eff:Wct on military efficiency as far asmachinery is concerned.

IV. General Summary.

The CATRON was outside the effective range ofserious mechanical damage from this form of attack in Test B.

V. Preliminary Recommendations.

None.


Page 20 of 46 Pages

DETAILED DESCRIPTION OF MACHINERY DAMAGE

A. General Description of Machinery Damage.

(a) Overall condition.

The forward engine room and auxiliary machineryroom were floodedi by water entering through a broken salt watercooling line in the lube oil cooler of the forward main circulatingpump. Photo 1E!89-6, page 41 shows the broken line. The floodingcould have been controlled if the crew had been aboard. Other-wise, the overall condition of the machinery was not changed by TestB. The main injection and overboard valves of #1 main condenserwere open during the test.

(b) Areas of major damage.

Forward machinery room and auxiliary machineryroom flooded.

(c) Primary causes of damage.

There was no primary damage. Secondarydamage resulted from flooding.

(d) Effect of target test on overall operation of machineryplant.

Flooding could have been controlled, had per-sonnel been aboard. In this case, it is not believed that the testwould have had any effect on overall operation of the plant.

B. Boilers.

There was no apparent damage to the boilersexcept that to boiler #1 incident to the flooding of the forwardengine room. Photo 1930-9 and 10; pages 38 , and 39 shows theforw~ard machinery space, including the front of boiler #1 priorto dewatering.


Page 21 of 46 Pages

C. Blowers.

No apparent damage.

D. Fuel Oil Equipment.

No apparent damage.

E. Boiler Feedwater Equipment.

No apparent damage.

F. Main Engines.

No apparent damage.

G. Reduction Gears.

Not anplicable.

H. Shafting and Bearings.

No apparent damage.

I. Lubrication System.

No apparent damage.

Condensers and Air EFlectors.

No apparent damage. No. I main condenserinjection and overboard discharge valves were open duringTest B.

K. Pumps.

No apparent damage.

L. Auxiliary Generators.

No apparent damage.


Page 22 of 46 Pages

M. Propellers.

The propellers were not inspected. There is noreason to believe that they were darnaged.

N. Distilling Plant.

No apparent damage.

0. Refrigerating Plant.

No apparent damage.

P. Winches, Windlasses and Capstans.

No apparent damage.

Q. Steering Engine.

No apparent damage.

R. Elevators, Ammumition Hoists, Etc.

No apparent damage.

S. Ventilation (Machinery).

No apparent damage.

T. Air Compressors.

No apparent damage.

U. Diesels.

No apparent damage.

V. PipLag.


Page 23 af 46 Pages

The salt water cooling line to the lube oil coolerof #1 main circulating pump, forward engine room, broke. Thisallowed water to enter the ship. The cooling line is taken off the maincirculating system, the injection and overboard valves of which wereopen. during this test. The forward engine room and auxiliarymachinery room were flooded to the outside water line.

There was no other apparent damage to piping.

W. Miscellaneous.

No apparent damage.


Page 24 of 46 Pages


SECTION III - ELECTRICAL

GENERAL SUMMARY OF ELECTRICAL DAMAGE


(a) Drafts after test; list; general areas of flooding, sources.

The drafts and lists were not observed. The for-ward ma'chinery space and the auxiliary machinery space wereboth flooded.


Not observed.

(c) Other damage.

Flooding cf equipment in the two machinery spaceswas the only damage sustained by electrical equipment.

II. ?orces Evidenced and Effects Noted.

(a) Heat.

No effects of heat were noted.


There were no fires nor any explosions on the vessel.

(c) Shock.

No effects of shock were found in any electricalequipment.

(d) Pressure.

No effects of pressure were noted in any electricalequipment.

SECRET USS CATRON (APA71)Page 25 of 46 Pages

(e) Any eff ects apparently peculiar to the atom bomb.

No effects., other than the high radioactivity, we.found as being peculiar to the atom bomb.

MI. Effects of Damage.

(a) Eff ec t on propulsion and ship control.

Half of the electric propulsion would be lostthrough the flooding of the forward main motor and forwardauxiliaries. Ship control would not be effected.


There would be no effect on gunnery and firecontrol due to electrical damage.

(c) Effect on water -tight integrity and stability.

There would be no effect on watertight integritynor on stability due to electrical damage.

(d) Eff ect on personnel and habitability.

Electrical damage would have had no effect onpersonnel. The habitability of the ship would have been reducedby the flooding out of all evaporator pump motors.

(e) Total effect on fighting efficiency.

The fighting efficiency of the ship would have beengreatly reduced due to the loss of one propulsion motor andauxiliaries.

IV. General Summary of Observers') Impressions and Conclusions.

The damage as found would have limited the

effectiveness of the s h i p due to the loss of half of the propulsion.

SECRET TJSS CATRON (APA7l)

Pege 26 of 46 Pages

Had a ship's force been aboard at the time of the blast, the floodingwould have been controlled and no damage to electrical equipmentwould have occurred.

The inspection furnishing the material for thisreport was made very quickly due to high radioactivity.

V. Any Preliminary General or Specific Recommendations of theInspecting Group.

Although flooding of electrical gear occurred,the flooding would have been controlled under normal conditions;and therefore no recommendations are warranted.


Page 27 of 46 Pages

DETAILED DESCRIPTION OF ELECTRICAL DAMAGE

A. General Description of Electrical Damage.

(a) Overall condition.

Except for flooding, there is no change in thecondition of the electrical equipment.

(b) Areas of major damage.

Flooding occu~rred in the forward machinery spaceand in the auxiliary machinery space.

(c) Primary causes of damage in each area of major damage.

Flooding was the only cause of damage.

(d) Effect of target test on overall operation of electric. plant.

1. Ship's service generator plant. - The flooding of theforward machinery space and the auxiliary machinery space would haveput out the ship's service generators in those areas. The A.C. andD.C. ship's service generators in the after machinery space wouldnot have been effected by the flooding.

2. Engine and b~jler auxiliaries - All auxiliaries onthe lower levels of the forward machinery space and the auxiliarymachinery space would have been put out due to flooding.

3. Eillectrical nroptilsion - Thp forward main motorwas flooded out,.

4. Communications - No communication circuitsexcept those running into the flooded areas were effected.

5. Fire control circuit - No change.

6. Ventilation - No change.

SECRET uss CATRON (APA71)

Page 28 of 46 Pages

7. Lighting - No change except for equipment flooded

out in lower levels of forward and auxiliary machinery spaces.

(e) Types of equipment most affected.

1. Switchboards and switch gear - Not affected.

2. Rotating machinery - Not affected except forflooding the two machinery spaces.

6. Motor controllers - Not affected except in areasof flooding.

4. Cables and supports - No affect except whereimmersed by flooding.

B. Electric Propulsion Rotating Equipment.

The forward main propulsion motor was floodedout. There was no visible damage to the after main propulsion motor,nor to A3ther propulsion generator. No operating test of the equipmentwas possible.

C. Electric Propulsion Control Equipment.

Both of the main propulsion control panels wereinspected and no damage found. No operating tests were possible.

D. Generators - Ships Service.

None of the five ship's service generator setslocated in the three machinery spaces was found damaged oninspection. The loss of necessary auxiliaries by the floodingof the lower levels would have prevented operation of the machinesin the forward and in the auxiliary machinery spaces. No operat-ing tests were possible.

E. Generators - Emergency.

No damage was found by inspection of the machine.No operation was possible.

SECRET USS CATRON (APA71)Page 29 of 46 Pages

F. Switchboards, Distribution and Transfer Panels.

No damage was found by inspection of the forwardand after ship's service switchboards, the emergency switchboardand the board in the after distribution center on mali deck. Somebreakers and distribution switches on these boards were triedand none were found damaged. No operation of any switchboardwas possible. A few distribution panels on the vessel were inspectedwith no damage found.

G. Wiring, Wiring Equipment and Wireways.

Some wireways and wiring equipment throughoutthe ship were examined. No damage except flooding damage in themachinery spaces was found. No sign of movement c' any wire waywas foundi

H. Transformers.

A few transformers- thoghu ..... Q'-• VV --

inspected. No damaje was fomnd.

I. Submarine Propelling Batteries.

This item does not app~y to the vessel.

3. Portable Batteries.

A visual. check of the batteries in the Dieselgenerator room showed no sign of damage. No other batterieswere inspected.

K. Motors, Motor Generator Sets and Motor Controllers.

A check of representstive motors and controllersthroughout the vessel revealed no damabe except where flooded outin the machinery spaces. The motors inspected included the steer-ing motors and controllers and one cargo winch controller.


Page 30 of 46 Pag .

L. Lighting Equipment.

No broken lamps or lighting equipment was ob-sf rved on the inspection tour of the vessel.

M. Searchlights.

No damage was revealed by a surface check ofsearchlights.

N. Degaussing Equipment.

The ship's degaussing panel had no visible damage.There was no hull damage In the way of a degaussing coil run.

0. Gyro Compass Equipment..

The master gyro ccmpass and panels had novisible damage.

P. Sound Powered Telephones.

Sound powered telephones were not observed, butthere was no structural damage in locations where they would befound.

Q. Ship's Service Telephones.

The sound powered telephones are the onlytelephones on the vessel.

R. Announcing Systems.

The M.C. amplifier panel in the I.C. room, wasnot damaged. No damaged speakers were observed on the inspect-ion tour of the vessel. No operating test of the equipment was pos-sible. There was no visible damage to the PAB ' Beachmasterset erected on the flying bridge.


Page 31 of 46 P2o-s

S. Telegraphs.

Telegraphs were not observed in detail, butthere is no structural damage in the bridge spaces nor in themachinery spaces to indicate possibility of damage.

T. Indicating Systems.

No detailed inspection of indicating systems wasmade, but there is no structural damage to indicate possibility ofdamage to indicating systems.

U. I.C. and A.C.O. Switchboards.

Visual inspection of the I.C. and A.C.O. combinedswitchboard showed no damage. No operating test was possible.

V. F.C. Switchboard.

There is no F.C. switchboard on the vessel.

W. Miscellaneous.

No comment.


Page 32 of 46 Pages

SECTION IV

PHOTOGRAPHS

TEST BAKER

0


Page 33 of 46 Pages

AA-CR-227-289.-46. View from off port bow after Test B.

SECRET USS CATRON (ARM/i)Page 34 of 46 Pages 7544

-V44

4",

AB-CR--227-289-42. View from off starboard quarter after Test B.

SECRET USS CATRON (APA71)Page 35 of 46 Pages 7544

AB-CR-79-2960-2. Displaced battens over forward cargo hatch.

SECRET USS CATBON (APA71)page 36 of 46 Pages. 74

AB-C?-79-2961-9. Displaced battens over after cargo hatch.

SECRET USS CAT? ON (APA71)Page 3'7 of 46 Pages. 74

AB-CR-76-1930-9. Flooding in forward machinery space.


AB-CR-76-1930-1O. Flooding in forward machinery space.

SECRET USS CATPON (APA71)Page 39 of 46 Pages 7544

AB-CR-76-1930-11. Flooding in auxiliary space.

SECRET USS CATROIN (APArI1)Page 40 of 46 Pages 7544

AB-CR-68-1689-6. Broken cooling line nipple, main circulating pumpoil cooler.


APPENDIX

SHIPS MEASUREMENT DIAGRAM

TEST BAKER

SECRET U.S.S. CAT"RON (APA1)

Page 42 of 46 Pages

APPENDIX

SHIPS MEASUREMENT DATA

Four deflection scratch gages were installed in the after machineryspace to record movement of the ships sides and of the main deck.A tabulation of gage locations and recordings Is on page 4,1,


Page 43 of 46 Pages

(I) c

0 0 09:z Z a

LLI x

0 zi 0 i --2 4-4

a: 0 0

W 0 00

0

1 0

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USS CATRON (APA-71)

Page 44 Of 48 751N~

APPENDIX

COMMANDING OFFICERS REPORT

TEST BAKER


Page 45 of 46 Pages

REPORT # 5

COMMANDING OFFICERS REPORT

SECTION I

This command sustained the following damage from ex.p]oding of the atomic bomb, test Baker.

Metal hatch boards were lifted off beams and fell intoboth holds.

Forward engine room flooded about 6 feet. Evaporatorroom flooded about 9 feet.

Owing to short period permitted us at reboarding on12 August 1946 no time for further examination was possible.

SET USS CATRON (APA71)

Page 46 of 46 Pages

Defense Special Weapons Agency6801 Telegraph Road

Alexandria, Virginia 22310-3398

TRC 18 April 1997

MEMORANDUM FOR DEFENSE TECHNICAL INFORMATION CENTERATTENTION: OMI/Mr. William Bush (Security)

SUBJECT: Declassification of Reports

The Defense Special Weapons Agency has declassified the

following reports:

V&AD-366588it XRD-203-Section 12v*"

AD-366589t" XRD-200-Section 9

AD-366590L. XRD-204-Section 13

AD-366591%.- XRD-183

04AD-366586 XRD-201-Section l10

vAD-367487.I XRD-131-Volume 2,-

V'AD-367516 4 XRD-1I43 .-

V'AD-367493q XRD-142-

AD-80141OLv XRD-138

AD-376831L" XRD-83

AD-3667595 XRD-80

VAD-376830L L XRD-79 v'

V&AD-376828L XRD-7 6;/

VAD-367464 "O XRD-106'e

AD-801404LV XRD-105-Volume 1

v'AD-367459 6 XRD-100lO

TRC 18 April 1997

Subject: Declassification of Reports

/AD-367517&ý XRD-141

AD-366762V XRD-84

AD-366760PV XRD-81

AD-366761V" XRD-82

AD-367501%-" XRD-158-Volume 1

AD-367507L V XRD-152-Volume 4

VAD-367495 k XRD-184"

v-AD-367485 XRD-129Y

W'AD-367484 Ak XRD-128V

VkAD-367483 XRD-127Y

AD-367482V XRD-126t'

AD-367488V XRD-132

AD-367480O XRD-124-o

AD-801409LV" XRD-135

AD-367490O XRD-136w

AD-367492• XRD-137"-

AD-801411LV XRD-139

AD-367518 I XRD-140

AD-367515 / XRD-144

AD-367514 ' XRD-145

AD-367468Vk XRD-ll0-Volume 2&

AD-367513V/ XRD-146

AD-367497'( XRD-162V"

TRC 18 April 1997

Subject: Declassification of Reports

AD-801406L v XRD-114.

In addition, all of the cited reports are now approved forpublic release; distribution statement "A" now applies.

ARDITH JARRETTChief, Technical Resource Center

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AUTHORITY - DTICof the weather deck cargo hatch cover battens forward and 95% aift are dislodged....

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