PROJECT BLUE BOOK

1. CATE 2. LOCATION 12. CONCLUSION'S
22 May 1952 Stockton.California Was Balloon
Probobly Balloon
4. TYPE OF OBSERVATION D Possibly Balloon
3. DATE-TIMS GROUP
Locol_1240__PDT Ground-Visual Ground-Rador 0 Was Aircraft
XViaualnRavier 0 Probobly Aircroft
GMTOZ 1940 2 0 Air-Visual Air-Intercept Rodar 0 Possibly Aircraft
5. PHOTOS 6. SOURCE 0 Was Astronomical
GYes Roserve Artillery 0 Probobly Astronomical
Officer and 7 other people D Possibly Astronomical
No
7. LENGTH OF OBSERVATION 8. NUMBER OBJECTS COURSE 0 Other...
00 Insufficient Data for Evoluation
25 Kin 1 Unknown
0. BRIEF SUMMARY OF SIGHTING 11. COMMENTS
Nearest scheduled Transit reading was elevation over
San Francisco Area Stockton Naval Supply Station. Faded
. away aftor 25 Minutes.
Radar picked up som object at 8.000'
+ at 1300 PDT. Interception negative
Colai Bright Silver winds 360
Sha po: Rectangular
. Observers on interrogation statc object
wnadefinitelv. in their

LENGTH OF TIME OBSERVED: 25 1Hin
SOUND: Unknown
SPEED: Stationary
ALTITUDE: 30,COO
HEADING: Unknow .
SOURCE: Civilians
ACTION OR COMMENTS: NOne :
.
silver, rectangular object hovering in sky and
eventually fading away.
UNCLASSIFIED
. .
.
.

TO: Commanding Officer
Air Technical Intelligence Center
Wright-Patterson Air Force Base
Ohio
ATTN: ATI 4
:
l. Attached hereto for your information are two cooies
of the report nvestigation by Special Agent MARK L. McDERMOrT,
19th OST Distric Cile 24-14s, dated 26 June s above.
. 2. Investigation was initiated by the District Commander, 19th
OSI District Travis Air Force Base, California, based on information
i8 from Mr that he and several other persons had seen a rec-
tangular object in the sky.
3. described object. Mr. and Mr
stated they observed object and believed it to be a weather balloon.
investiative the
of the Office of Special are closed in this
matter.
5. Attention nis invited to par 7, AFR 205-l, which lis-
closure of classified information to unauthorized personnel.
1.nont.
1 Incl (in dup) V
D. G. NORTH 1
R/I, DO #19, dtd 26 Jun 52 Lt Colonel, USAF ALS:
District Commandar (u
Cony to: DOWNGRADED AT STEAR TNTERY
Hq OSI DECLASSIVIED AFTER 12 YEARS.
UNCLAS DOD DIR 5200.10
DO #19
1
712-48
AIR FORCE-WPAFB-L-29 FEB 52 ISM

SECURITY INFORMATION
HEADQUARTERS UNITEL ATES AIR FORCE FILE NO. DATE
THE INSPECTOR GENERAL 24148 26 Jine 1952
OFFICE OF SPECIAL INVESTIGATIONS REPORT MADE BY
REPORT OF INVESTIGATION MARK L. McDEROTT S/A
TITLE REPORT MADE AT
UNKNOWN I SURJECT DO #l9, Travis AFB, California
Flying object reportedly seen PERIOD
at Stockton, California on 22 May 1952
22 May 1952 OFFICE OF ORIGIN
DO 19. Travis AFB, California
STATUS
CLOSED
CHARACTER SPECIAL INQUIRY
REFERENCE TWX, 19D 0875,, dtd 23 May 1952, to Hq OSI
SYNOPSIS
This investigation initiated by District Commander, l9th District OSI
to the effect that he and several other persons had
seen a retangular object in the sky at approximately 12l0 hours 22 May
1952. stated object was at approxinately 30,O00 feet altitude
on a horizontal azimuth of approximately 35o degrees and on vertical angle
of approxinately 85 degrees. Mr. stated that he also
observed object but believed it to be a weather balloon. Mr.
stated he observed object and believed it to be a weather balloon.
DOWNCRADED AT S YEAR INTERVALS; TEARS.
DOD DIR 6200.10
File
APPROVED
EUCCIE SMITH
Golonel, USAF
DISTRICT COMMANDER
NEIDENTIALSECURITY INFORMATIONMA

declared that he visually pleced th object in relation to the edge of a
building cO to determine drift. notion
minutes, the object reuained stationery object was
last seen at l305 hours. advised that the object
away, but disappeared from sight. stated that according
to his estimate, the object was on a horizontal azimuth of
n a vertical angle of degrees.
3. On 22 May 1952. Mr
was interviewed at which time he stated that on 22 May 1952 as he
in his opinion object sky was definitely the same type.
4. emoloyee the Navy at the Naval Supply
Annex, Stockton, California was contacted at bis home.
Stockton, California. Mr. advised that he is emoloyed
as en Assistant Division Suoervisor (Ordnance) at the Naval Supoly Amex.
tated his attention was called to an object sometine shortly
another emlovee. 8 stated there
was no telescope available or any other instrunent with which to look at
the object. ascribed what he saw as appearing to be a globe having
no wing or assembl was of a silvery color. He looked at the
2 UNCLASSIFIED
CONFIDENTIAL SECURITY INFORMATION
MAMA-Apr 52-50M
.

UNCI SIFIED
3
CONFIDENTIAL SECURITY INFORMATION
SMAMA-Apr 52-50M

XDD087 ong
ULVSO
JWPML 104
RR JEPHQ JEDWP JEDEN 333
DE JWPML 81A
R 22330Z ZNJ R 2330Z ZNJ
FM CG WADF HAMILTON AFB CALIF ACTION 1
TO JEPHQ/DIR OF INT HQ USAF WASH DC
JEDWP/AIR TECH INT CEN CEN WRIGHT-PATTERSON AFB OHIO WRIGHT-PATTERSON AFB OHIO
t t
JEDEN/CG ADC JEDEN/CG ADC ENT AFB COLO UNCLASSIFIED
WDOID 21673 ATTN CLN ATIAA-2C FLYOBRPT PD /1/ WDOID 21673 ATTN CLN ATIAA-2C
ONE OBJ CMA BRIGHT CMA SILVERY IN COLOR AND RECTANGULAR IN SHAPE PD
HOVERED IN AIR AT ESTD HEIGHT OF 30,OOO FT CMA DISAPPEARANCE BY FADE-
OUT PD /2/ 1240 PDT CMA 25 MINUTES PD /3/ VIS CHECK OF ESTD ALT MADE
- BY ESTBG ANGLES PD /4/ ONE MILE VIEW OF STOCKTON CMA CALIF PD CMA
. NAVAL SUP STA PD /5/ MI-- CMA RES CAPT FA CMA EMPLD
NAVAL SUP STA PD CMA STOCKTON PD /6/ 10,O0-30 DEGREE-20K SMCLN
20,000-362 DEGREE-30K SMCLN 30,000-365 DEGREE-30K PD /7/ NONE KNOWN /8/
NEGATIVE /9/ INTCP IN AREA APRX TIME BUT LOWER ALT /RADAR TRAILS AT
P52058 CMA 2036Z CMA CONTACT LO INTCP/ BOUT 1300 2
- JETS BUT LOWER ALT PD
23/0132Z MAY JWPML DOWN DECLASSIVI DOD DIR 620.10
UNCLAS
- 47

.
( (
1 UNCLASS
.
.
6O.T
RC54 -
FArInA
WPF026 1
XYAS62 -
72
JPFN ADB348 2AT1A -
RR JEPHQ JEDWP 222 3 Contral Frile
DE JWPFN 58LM ACTION
R 2300452 ZNJ -
FM HQOSIDIST IG ONE NINE USAF TRAVIS AFB CALIF
TO JEPHQ/HQUSAF DIR OF SPEC INVES WASHDC
ATTN: ATIAAC-2C 19D OSI 0874 SUBJ UNCONVENTIONAL
E TWO FOUR DASH ZERO PD AT ONE FOUR THREE ZERO HRS TWP 4.
ACFT CMA OUR FILE
MAY FIVE FIVE TOW CMA A MALS MA AO FOUR TWO EIGHT
EIGHT SEVEN TWO TELEPHONICALLY ADVISED THAT A MR EDWARD PICKERING CMA (.
CIV EMPLOYEE OF THE NAVAL SUPPLY ANNEX CMA STOCKTON N CALIF F ALONG WITH
2
19402
UNCLA ~
. -
PAGE TWO JWPFN 58LM
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2
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4 (
PELL CNY ONSEITE INOTEOME SVAN MLLO SD VL CE LONB LIDEE SEKO NWE LAS
08M7 2nE9 M00E/L1OVT +
EAO CERNANGCVRC AEICNL EVELEEAOU YED CHTO.
.
1
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and rectangular in shape group eight (8) people observed the object.
and reported the incident to o Maj. Robert L. Stimpson, Army actor of
the 49th Infantry Division, California National Guard.
A civilian. Mr also an Army Reserve cantain.
took a reading by using established rectangles by which he estirated - drobject
to be at 30,000 ft; vertica 50; horizontal azimuth 350.
The object was visible for ao 5 minutes, then faded away.
Winds aloft were as follows 10.00 50
at 30 knots; 30,0c0. 360° at 30 kr
The Stockton Interstate Air Weather Station, Stockton, California
was queried re weather baloons sent aloft during the period of 2hoo hours
An intersept radar tracke at lower al tituden (800o
ft.) by two J-89 ad
contaet wae made-
Kaith H. Morehouaa
Capt USAF
Chief. ence
DECLASSIFIED A/TER 12 YEARS.
DOD DIR 5200.10
+
DISTRIBUTION BY ORIGINATOR
1 - D/I USAR 1 -Chief, ATIC
1 -D/I ADG ATTN: APIAA-20
WP AFB, Ohio
NOTE THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, SO U. S. C.-
31 AND 32. AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF.
IFIED
.