PROJECT BLUE BOOK

. UNCLASSIFIED

APPENDIX v ~
Korea ~« ~ 2h e February 1952

I. DESCRIPTION OF INCIDENT

On the night of 24 February 1952, at 2315 local Korean time, the navi-
gator of a B-29 observed an unidentified acrial object. The R.29 Kas picked
up by searchlig¢hts and about 45 seconds later the navifator sighted an otject
approaching from 7 o'clock, The object was estimated to be over Antung at
this tine, The object appeared to be cylindrical in shape and had a rapidly
pulsating gaseous type of exhaust trail, The exhaust trail was approxi: stely
three times the length of the object with both the tail blast and the object
bluish in color.

When first observed the object appeared to te cli: reget at 45°. however,
4t leveled off approximately 4,000 ft. from the B-29 and turned toward the
B-29 as if taking up an interception course. The object continued to cl-se
on the B-29 at high velocity for approxinately 15 seconds after which tire
it broke off level flight and headed down, passing under the B-29 at a
grecual angle, As the object began to descend the flare dininishedc in size
ena got brighter. The navigator estimated that the object cane within 2000
ft. of the aircraft and “it appeared to be the size of an automobile",
(Assuned to mean the same size as an automobile viewed from 3,000 ft.)

The B-29 was flying at 22,000 ft. altitude and at a speed of 200 krots,

The searchlights stayed with the aircraft for approximately four minutes
ane weak inaccurate flak was encountered during the entire incident.

Weak electronic signals were picked up by the electronic counter-
measures operator for a short time,

II, STATUS OF INViSTIGATION

More details on the sighting have been requested from FEAF. Since ths

object resembles a surface-to-air guided missile, the incident has been re-
ferred to the ATIC guided missiles group.

DOWNGRADED AT 3 YAK OITERVA
DECLASSIDIED AFTICR 12 YEARS
DOD DIR 6209.10

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a. Re RGN ge DN UNC? ASSICIE LD CSAP ITEM 1
TO ATIAASRC RUPPELT FROM AFOIN-V/TC POURNET ATTAA

SEAT CABLE AX 2663 INT-EVAL DID 26 FEB 52 ATIAA

REFERS TO CYLINDRICAL OFJECT WITH BLUISH
TRALL TRAVELLING AT KIGH SPEED SIGHTED BY Be2d Fh Aye
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COVER KOREA. SINCE CG AMC IS ONE CF ADDRESSEES, BM
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PSSUME YOU CAN OBTA NCOPY, 6! 995, PLEASE
pOVESE AND WE WILL FURNISH YOU WITH EXTRACT.

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AUTH:C0,ATIC_
By: F.3.Smith ~~

Capt, USAP

3 Feb 52

29 February 1952
are C.F. Zimmorman, ATTA &
, _uncuasdiPS —
Cagle - i
oe Reference Teleeon trom co WEAF SAPIC~232

dated 26 February 1952, re sighting of object on nd gt: of 2h; February
19825. ‘Based on perhbimnbine deduced from the ‘reported information .

} object appears to be @ subsonic surface-to-air gu: aoe missile,
‘possibly of the German SchmetterLing: type. : ‘Canrect estimates credit
the Soviets with the capability of having an operational surface-to~
air guided missile of this type now, although until this tine thors
has been no intelligence on which to eredit the Sovists with more

' than a eapantlity, A more complete evaluation of =~ oo
willbe inode upon receipt of complete inforantion from FRAP, 7

Mr, C.F, Zimmerman, ATIA on Fae

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. (CLASSIFICATION) a ‘4 a
APPROVED | JUNE |3A

UNTR reoar <4 N PPaNK) :
____Korea _ | TRa1=52 Srna aif oF: ba LO)
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_AIR INTELLIGENCE INFORMATION REPO
sumect 3 weriees peo “< 77
Ground to Air Missile, Possibly Guided. ha te
AREA REPORTED ON ~ FROM (Agency) ~~
North Korea ; a ee ee.” rr
i ———. DATE OF INFORMATION | EVALUATION
Feb 1952. pee Ye | Bed. '-
sie rate hilar and ee!

Captain I. O, Mitchell, Flak Intei.Orficer | Captain 8 Re We Sinith, 345 B.S. 95th Bae

“REFERENCES (Contral number, divectiee, precious report, c., as applicable) =Osstst—<i<=CSsts™—S
NONS

SUMMARY: (inter concise pummary of report. Giee vignifcance in Anal one-sentence paragraph. Liat inclomurrs al Lower left, Begin text of report on AF Form 119—Part 11)

A navigator on a B=29 leaflet drop mission flown on the night of 23 Feb southes:
of Sinniju observed a ground to air rocket with flignt guiding chara Setanietians.

UNCLASSIFIED

» O. Yicledith
Captain, USA
Interrogating Officer

WILLLiN Be. MERRILL, JR
Lie Gol., USAP
Deputy for Intelligence

DOWNGR- DED AY Tv _ eet ~ pt sae
DECLAS= lr). -\ Y ‘ a os
DUv Da i ke VoeUV.eY

UNCLASSIFIED

—— InCLSe

—_——— -_ —_—_—_

WSTRI BUT On #Y OMGINATOR®

1 copy = re +A i Original - US AP
1 copy = SAC

3 copies = File

NOTE THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT. 50 U.S C.—
31 AND 32, ASAMENDED 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 O8 IN PART, BY OTHER THAN UNITED STATES AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF
INTELLIGENCE, USAF,

\cLA SIFICATION)

.

37

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AF FORM 112—PART W . eum se

APMVMOVED TV JUNT D8

AIR INTELLIGENCE INFORMATION REPORT

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Mt 23151, a B-29 on leaflet mission al XN 2036 heading Q50", altituce 22,5

ft, was nicked up in saurchlight bean by two lights on right sid» of actt. ith

LS seconde after acft was illuninated by searchlights, taviator observed oh inet
approaching acfrt fran position, on ground estinnted vy ba at XB 2342. No launching

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in

blast was observed and object appeared bo approach acft at an angle of 30° fron the
Left reare hen cbhserver initially spotted objecb, it appeared to be round in shape
enti brieht blue in color. As it case closer to the acft, the shape appeared cy-
lindrieal with bail approximately three tines length of tie for ward wass of objects
The color of the tail was ra Same as epyact and appeared to be a rapidly pulsating
faseous type propulsion blast. (Observer Suv object for an eatinated 45 seconds.

The course of the obj-ct was at an amrtle of L5° fron HOPARONLGA, of hith velociby
(lat in trajectory until it leveled off approxicately 4000 ft. from ac

assunedk level ¢light charucteristics, turned to the Left ngs though making a correce
tior to intereept acft at a predicted point. The object contimierl bo close in
toward interception point on level with acft for about 15 seconds and then broke
off in flisht and head down and underneath acft at gradusl anvle. at the closest
point, the object appeared to com within approximately 3090 fte of acft and
appeared to be the size of an automobliin. As it broke off from level Plisht, the
tail diminished rapidly in site and becam brighter in color. The indicated air
speed of acft was 200 knots and acit remained at 22,009 fl. altitude. Searchlights
continied to illuminate acft and monger, inaccurate flak was encountered during

enbire period object was observed, oeorchtights worked in multiples of tro and

four light pickups, and kept ship illutinated for approximately four mimites, SC.
operator reteived weak electronic signals, bat wus unable to tuke electronic counter
Of «3 >

_
~

measures. Pilot executed evasion action in a series of "S" curves, then nade a
j shallow dive and searchlights and flex ceased. weather was clear and visibility
wri imit ead °

Navigator who observed object is experienced. Served in iii Il, holds grade of

*

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—

Captain and has flow 15 combat missions over North Korea. Has never observed an
object previously and is of the opinion that he saw a rocket. He is positive that
object was not searchlight reflection or another acft. He is the only meer of
the air crew who reported observing anything unusual. He is considered extremely
reliable and rational.

Comments of Interrogabing Officer. Bright blue flume suzzests possibility of

alcohol and coreg laf oxygen fuel. CGhanzes in course of flizht of Sothink imiicate
poss ibs lity of electronic ruLding devi Ce. cVED.

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: Mh Vite hle

ty TICHULL

“Hired ese UGA
Interrogating Officer

—— ee ee ee ee

APPROVED:

Patewisil

WILLIAM B, “asta, If
Lt e Col *»s { SAP
Deputy for Intelligence

A i A ey

NOTE: THIS HOCLIME ST CONTAING INFORMATION SP ECOTING THE NATIONAL OL PENSE OF THE UNITE TIATES WITH THE MOANING OF THE PSPIONAGE 4° 7, OU SCH
31487 2 AO AMTNOTD ITD TRANOMICSION OF THE REVELATION OF ITS CONTENTS IN ANY MANNE TO AN UBAUTH OMI ZED PLRGON = recnnst Te Oo BY LAd,
It MAY HOT AE REPPODUCED IN WHOLE OF IN PART, BY OTHER THAN UNIIFD STATES Alt FORCE AGLNCILS, CXCUPT BY PERMISSION GF THE DIRECTOR OF
INTELEL TO Dice LAP ms