PROJECT BLUE BOOK

PROJECT 100 ECORI CARD
.. . .
1. DATE 2 LOCATION 12. CONCLUSIONS
o Was Bolloon
18 October 19 51 38.48N 123.16E (Yellow Sea o Probobly Bolloon
3. 4. TYPE OF OSSERVATION D Possibly Balloon
DATE-TIME GROUP
Local_ Ground-Visual Ground-Roder at Was Aiscraft
Q Probably Aircralt
GMT 13/0333Z XCAinVisol Air-intereopt Rader D Possibly Aircralt
5. PHOTOS 6. SOURCE D Was Astronomicol
Yes D Probobly Astronomicol
CNo Military 0 Possibly Astronomical
7. LENGTH OF OBSERYATION B. NUMBER OF OBJECTS 9. COURSE Other
000 Insufficient Deio for Evaluotion
16 minutes One Manuevered Unknown
TO. BRIEF SUMMARY OF SIGHTING 11. COMMENTS
Color was red or white- Orange exhaust. Speed A/C sighting.
530 kmots. Shape; A/C w/swept back wings.
Size 60' long. Accelerated and decelerated
to maintain same interval between source and
observer.
1
ATIC PORM 329 (REV 269EP 52)

16 miles where again was much rapidi
to twenty-two mile wheri on radar Visual contact
clouds. Our tru airspeed at time mas one hundred seventy. This, plus his com
puted speed relative .ga airspeed five hundred thirty knots. The
chase was then discontir ty-two minutes had elapsed sinds
the primary contact.
I tri but
was uable to.
His flight attituce visual ran
"cocked angle of about twenty-five degrees, indicating a very high speed
staggerin airborne at slower speeds.
GEORGE T. , GREOCI
DOWNGRADED ENS, U.S.
DECLASSIFIED AFT YEARS.
DOD DIR 5200.10
MOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING S THE NATIONAL DEFENSE OF THE UNITED
IT MAY NOT BE REPRODUCED IN WHOLE OR IN F PART, BY OTHER THAN UNITED STATES AIR UNCLASSIFIED PERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF.
18-54570-1 * 44 N1EI

1
1
1
1
1
a 1
MI 090°
. TRUE
HEADING
1
270°
MARINER 1 BEARING
BOGEY HEADING
194°
HEADING
PATROL OF
ACFT.
S.
INCLOSURE NO.1 DOWT
FEAF -52 DOD DIR 5200.10
NOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, SO U I C - TYLA
31 AND 32, AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROMIBITED C
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER
INTELLIGENCE, USAF.

MARINER HEADING
"TRUE" 31/2M
12 M1. 16 MI.
BOGEY SPEED AT THIS
POINT WAS 530 M.P.H.
INCLOSURE NO.2
FEAF FORM 2 -52 YEARS.
DOD DIR 5200.10
MOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF T THE POOHIHITEO BV LN.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER THAN INTELLIGENCE, USAF. UNITED
UNC .
10--58570-1

CRAFT APPEARE ERISH
IN COLOR.
BOGEY
.
INCLOSURE DOWNC GRADED AT S YEAR (NTERVALS)
NO.3 DECLASSIFIED AFTER 12 YEARS.
FEAF RM 12,N DOD DIR 5200.10
Note. This dOcument ContAins information affectingG THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, SO U S. C. -
3I AND 32. AS AMENDED. ITS TRANSMISSION OR T THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW.
INTELLIGENCE, USAF.
C
18- 270

PAGE OF PASES
PLAN OF OBS RVATION a
N
AIRCRAFT
(I94° HEADING)
BOGEY
270 + 90°
(IOO HEADING)
180° .
VERTIGAL DIAGRAM OF OBSERVATION
3/2 MILES
AIRCRAFT (AT NEAREST POINT)
BOGEY
5,000 FT.
49pr.
-
i
INCLOSURE NO. 4 BOGEY
FEAF FORM R-27-52 PERVALS:
WET T UNITED DOJU SPIOVAGEACT,BO U S.C-
AFFECTING THE NATIONAL DEFENSE OF THE ANY MANNER TO AN UNAUTHDRIZED PERSON IS PROHIBITED BY LAW.
IN S AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF
NTAGKLTCAF
D
A5T0-1

RED, =

DOWNCRADED AT S YE
DECLASSIFIED AFTE DOD DIR 520
SECELT UNCLASSIEED

4t1s
TO FROM AF DATE 18 DED 1951 COMMENT NO.1
Intelligene enter,
Wright-Pat AFB
Dayton, Ohio
Far East Air Forces letter with one inclosure, dated lz November 195l, subject:
"Unidentified Air Contact," is forwarded Intelligence Center for
information and retention.
1 Incl
FEAF ltr
dtd 12 Nov 51 Co1SL, UTAP
w/1 incl Depaty Chief, Evelustion
Division
A
When inclosure(s) Noo. is (are)
withdrawn or not attached, the
classification or this correspondene.
incellad or changed to DOWNGRADED AT 3 Y CAR INTERVALS:
accordance vit.h DECLASSIFILD APIN 12 YEARS.
DOD DIR 5200.10
Par. 25e, AR 205-1.
UNCLASSIFIED
DDFOBBS REPLACES A8 16--54801-3 GOVERN TING OFPICE

Force
Attn: Collections Division
Washingtor C.
l. Reference United States Air radio, Cite AFOIN
54577, dated 1 November l95l, requestir further information per-
taining to an unidentified air contact made by a Navy:patrol air-
craft, the TE-355) is submitted:
a.
East ot Sorthenn Patrol Plane Commander Ensign eorge Gregory
Patrol Plane PBM Mariner, BD-5
Tipot Korea Mission Heather reconnaissance
for TE 95.11
Date 18 October 1951
Debri ficer LTJG D.H. DEIN,
VP-46 *.
4/10 from 5000 to Soco feet
Visibility- Good
Moon:
Phase - Full
Elevation - 740
- , 1 Azimuth -. 2300 True
(2) Tima: 0333 ITEN
Patrol Plane: ATIC
(3)
Position - 35L5N, 123
Heading - 1940 True 3
Altitude - 5000 Feet
DOWNGRADED AT 3 YEAR
Gill 1
FEAF AG NO. 3 NION
.

red-orange longer color
changing t aoparantl wwer was added.
The PPC turned ard the contact, attemoting silhouette
the craft against photograph it. . Evidently,
the craft turned away. the distance of twelve miles,
so a photograph was not obtainod. Consequently, Ensign GRECORY
increased the pover rated power order to close the
range. Rader contact mas lost, but visual contact was maintained
until the estimated range became three miles. Meanhile,
the crew visually.
d.
At 0333I Cetobor
4211 123-166, the port
YEAR INTERVALS:
DOWN YEARS.
FEAF AG NO.36159 IFIED AFTER 12
DOD DIR 5200.10
UNCLASSIFIED 3

contact.
The craft's flama WaS extremaly bright at. all tinos believe
it was using fairly
low with a much differe
The hull large, I feet.. The wings were
sweot back and dowm tips, bending aporoxi-
mately at eighty-five percent of the wing length. appeared
to suffic s visibla.
above was axtracted from
an amplifying report of the unidentified he Naval
Air Patrol Squadron concerned.
AT S YEAR TERVALS;
DOWNGI YEARS..
DECLASSIFIED AFTER 12
DOD DIR 5200.10
3
33272-1
FEAF AG 31

DECLASSIFIED AFTER 12 YEARS.
i DOD DIR 5200.10 2 3
R2
ECE
rEAF AG FIED 1 8818
UNK

CHARLES Y. BANFILL
Brigadier USAF
Deputy Ligence
41N25 .
Tvo radar plots of bogey
One sketch of bogey
L One involved DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
1
DAL A, Cy H IN-REC, FEAF, Cy #7
ATIC,-Attn: IAA-2C, Cy #2 IN-EVAL, FEAF, Cy #8
G-2 Hq FEC ATLO, FEAF, Cy #9
File, Gy #10
31AND 2 AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNALTHORIZED PERSUN IS PPOHIBITED BV LAN
INTELLIGENCE, USAF.
TS2-/3259

APPROVED 1 JUNE 1943
AIR INTELLIGENCE INFORMATION REPORT
FROM (dymey) REPURT NO.
ATIL Office, D/I FEAF IR-27-52 FASE 1 cF3 PAGES
. The following report was recei ved n 46, through the
Commander, Irakuni Search and d Patrol Group.
a. General Inforration:
Patrol Plane Commander - Ensign George Gregory
- Patrol Plane - PBM Mariner, BD-5
Mission - Weather Reconnaissanc
Date - 18 October 1951
Debriefing Officer - LTJG D. -46
b. Initial conditions at time of contact:
(1) Meteorological Data: -
Cloud formations I 6/10 from 1000 to 2500 feet
4/10 from 5000 to g000 feet
Visibility I Good
Moon:
Phase. - Full
Elevation - 74°
Azinuth - 2300 True
(2) Time: 0333 ITEM +
(3) Patrol Plane:
Heading - 14° True
Position - 3548'N, 123
Altituds - 5000 feet
(4) Contact:
twelve miles,
GREGCRY incraased the power in order to close
contact was lost, but visual contact maintained
until range became three or fow miles. Meanwhile, the
DOWNGRADED FLATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW.
BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, DIRECTOR OF
DECLASSIFIED AFTER"12 YEARS
DOD DIR 5200.10 323
10-A5570-1 VPICE

the moon.
b. R Radar Contact:
(2) Radar contact was and
held continuously until the range The
radar contact was re-established as soon as the range of
increased bevond the nermal center scope clutter. The only
reason available for he loss c adar contact at l6 miles is
that the bogie maneuvered up out of the air to
.. surface radar being bit
c.
RADED AT 3 YEAR INTERVALS; Chade
DECLASSIFIED AFTER 12 YEARS. CHARLEY MNLVEN
DOD DIR 5200.10 Captain USAF
ATLO
NOTE THIS LOCU VENT CONTAINS INFORVATION AFFELCTING THE NATIONAL EFENSE OF THE UNITED STATES V SWITHIN THE MEANING OF THE ESP ONAGE ACT, SO U S. C -
AOF THE DIRECTOR CF
INGELLIGENCEUSAF.
* POINTINGONFICE
1.