PROJECT BLUE BOOK

PROJECT 10073 RECORD CARD
1. DATE 2 LOCATION 12. CONCLUSIONS
20 0c55 0 Was Balloon
Minnesota 0 Probably Balloon
4 TYPE OF OBSERVATION 4 TYPE OF OBSERVATION 0 Possibly Possibly Balloon Balloon
3. DATE-TIME GROUP 3. DATE-TIME GROUP
Local Ground-Visual Ground-Visual Ground-Radar Ground-Radar 0 Was Aircraft
0 Probably Aircraft
GMT21/0140Z 21/0200Z GMT21/0140Z 21/0200z AirVisual Air-Intercept Radar 0 Possibly Aircraft Possibly Aircraft
5. PHOTOS 6. SOURCE 2. 2 EX xX Was Astronomical Meteor Was Astronomical Meteor
Ys Y.s 0 Probably Astranomical
No military2 0 Possibly Astronomical
7. LENGTH OF OBSERVATION 7. LENGTH OF OBSERVATION 8. B. NUMBER OF OBJECTS . COURSE . COURSE DEK EX Rdar, Temp Inversion Rdar, Temp Inversion
l. Visual - 2 secs 100 00 Insufficiont Insufficient Data Data fo Evalvation valvation
1 varied Unknown Unknown
2. Radar - 15-20 seconds
10. BRIEF SUMMARY OF SIGHTING 11. COMMENTS
1. Oblong, glowing white, fast sharp 90 turn. white, fast sharp 900 turn. l. METEOR. Alleged 1. METEOR. Alleged turn turn considered, cons sidered,
tail. Visu y one pilot. illusion due to observers a/c being in
bank (note briefn ess of sighting)
2. Picked - fighter pilot
from same j on rada oblong in shape. 2. RADAR, TEMP INVERSION. Poss Reflection
due to very strong and very pronounced
temp inversion existing between 35,000
and 39,000.
.
4
.

of the oblect that you saw such as wings, protruslons, etc., and especlally exhaust trails or vapor trails. Placs
an arrow besido the drawing to show the directlon the object was moving.
. The edges of the object were: 18. The edges of the object were:
(Cirele One): a. Fuzzy or blurred rear d (Cirele One): a. Fuzzy or blurred reard Othor
b. Lika a brlght ster b. Lika a brioht ster
c.Sharply outlined c. Sharply outlined
Don't remember
IF there was MORE THAN ONE object, then how many were there?
Draw a picture of ho ey were

2. Draw a picture that will show the motion that the abject or objects made. Place an "A"at beginning
of the path, a "8 at the end of the path, and show any changes in direction during the course.
w
feet.
22 How large did the abject or objects appear as following objects held in the hand
and at about arm's length?
(Circle One): a. Head of a pin g. Silver dollar
Pea h. Baseball
c. Dime I. Grapefruit
dNicket I. Basketball
Quarter k. Other -
f. "Half dollor
Cortain c. Not very sure
Fairly cortoin d. Uncertain
23. How did the object or objects disoppeor from view? As iI weat nactt iT
burned Too lons and turned 90°

turnis ints Troffic De Hera.
a. North c. c. East . . South South g. West
b.. Northeast b. Northeast d. Southeast f. f. Southwest h. Northwest
28.2 How fast were you moving? *" miles per hour. miles per hour.
28.3 Did you stop at any time while you were looking at the object?
(Circle One) (Circle One). Yes No
29. What direction n you first saw the obiect? (Circle One)
a. North c. East e. South g. West
b. Northeast Southeast f. Southwest h. Northwest
30. What direction were you looking when you last saw the object? (Circle One)
a.North c. East e. South g. West
b. Northeast d. Southeast f. Southwest h. Northwest
If you are familiar with bearing terms (angular direction), try to estimate the number of degrees the object was
from true North and also the number of degrees it was upward from the horizon (elevation).
31.1 When it first appeared:
a. From true North 90 degrees.
b. From horizon _ Z0 degrees.
31.2 When it disappeared:
.From true North O degrees.
b. From horizon

Page 6
In the following sketch, imagine that you are at the point shown. Place an "A" on the curved line to show how
high the object was above the horizon (skyline) when you first saw it. Place a "B" on the same curvsd line to
show how high the object was above the horizon (skyline) when you last saw it.
N/A
a
in the following larger sketch place an "A" at the position the object was when you first saw it, and a B" at its
N/A

Page 7
34. What were the weather conditions at the time you saw the object?
34.1 CLOUDS (Circle One) 34.2 WIND (Circle One)
. Clear sky No wind /
a.
b. Hazy b. Slight breeze
c. Scattered clouds c. Strong wind
d. Thick or heavy clouds d. Don't remember
e. Don't remember S000
d. Thin layer
34.3 WEATHER (Circle One) 34.4 TEMPERATURE (Circle One)
a. Dry a. Cold
Fog, mist, or light rain b. Cool
Moderate or heavy rain c. Warm
d. Snow Hat
. Don't remember
When did you report to some official that you had seen the object?
21 Arc 55
Day Month Year
3 Was anyone else with you at the time you saw the object?
(Circle One) Yes (Circle One) No
36.1 IF you answered YES, did they see the object too? 36.1 IF you answered YES, did they see the object too?
(Circle One) Yes (Circle One) Yes No
36.2 Please list their names and addresses: 36.2 Please list their names and addresses:
Was this the first time that you had seen an object or objects like this? 37. Was this the first time that you had seen an object or objects like this?
(Circle One) (Yes) No
38. In your opinion what do you think the object was and what might have caused it?
dont Ksow,

Page 8
3.Do you think you can estimate the speed of the object?
(Circle One) Yes No
IF you answered YES, then what speed would you estimate? 1000- 1500 m.p.h.
Do you think you can estimate how far away from you the object was?
(Circle One) Yos No
IF you answered YEs, then how far away would you say it was? 22000 feet.
. Please give the following information about yourself:
NAME Steck W.llian
Last Name First Name
ADDRESS 432nd F.I.S Minne .St. Pul Mon Aopt. Mnneyol Miin.
Street City Zone State
TELEPHONE NUMBER PA /29/S &. 243 TELEPHONE NUMBER R PA12915 &4.243
What is your present job? P. 1o7
Age 26 Age _26 — Sex Sex M.
Please indicate any special educational training that you have had.
a. Grade school__ .. Technical school .. Technical school
b. High school (Type)__
c. College
d. Post graduate _
42. Date you completed this questionnaire: SS
Year

tion in the order in which they occurred. Additional pages of the if they are needed. size paper may be attached
NAME William F Steck (Do Not Write in This Space)
(Please Print) CODE:
SIGNATURE W.47.Stub
DATE 3 Nou 5S
-
Nad
got stange
theis Ame
sreed. this she tc
statiou t fil
with Uis ad
sonthly on thes
at 1000k.
scrlln
√

1s
ELECTRONICS DATA SHEET
(GROUND RADAR)
1
The purpose of this questionnaire is to provide technical data for evaluating the report of
an unusual radar target or track. It is requested be completed as accurately as
possible.
When not filled in, the form is Unclassified. The reporting officer use
judgement as to what degree of classi fication is required.
It is preferred that the answers to the questions be typewritten, bowever, if it will ex-
pedite the completion of the form, the answers may be printed in additional space
is needed, use reverse side of form.
1. STATION OBSERVING TARGET: 2. DATE OF THIS REPORT:
432 FIS 3 Nov 55
Organization Day Month Year
Mpls-St. Bul Intl Aupt.
Mols
3. DATE TARGET OBSERVED: 4. NAME, RANK AND ORGANIZATION OF
Local Time Local Time REPORTING OFFICER:
21 OCT 55 Z Tim Z Tim• 0 0 Shauanu, Donald E. 16t
Day Month h Yoar Yoar 432 Etr I Sgdn 432 Etr Ipt Sgdn
Time-Local 1940 Time-Local 1940 Time-Z 0140
5. EXACT ATION OF STATION (COORDINATES): RDINATES):
6. OBSERVER DATE (LIST EACH OBSERVER): OBSEI DATE (LIST EACH OBSERVER):
Ranis Na. of Yearm No. of Yearm
Name Ranks Duty Exp. ins Rodar Exp. in Rodan
.Donald E. Chavanu VLt Radan Observer 15by 2 VLt Radan Observer 1564 2
ai
E.
7. WAS A VISUAL SIGHTING MADE BY ANY PERSONNEL OF THE STATIUN? YES NO
IF SO, GIVE NAME AND RANK OF ALL PERSONNEL MAKING A VISUAL SIGHTING AND A BRIEF DESCRIPTION OF
WHAT THEY SAW:
ATIC FORM 332 (REVISED 25 NOV 19S2)
INCL#/

Willian Stek the 432 sighteed
urkenon ohj
On
pattein
tiuffie
lager. Wx iva 23,000 D.
9. RADAR SCOPE PHOTOS:
IS RADAR EQUIPPED WITH A SCOPE CAMERA? YES NO
WAS CAMERA OP ERATIONAL?-- YES NO
WERE SCOPE PHOTOS TAKEN?--- YES NO
WERE PRINTS OF THE SCOPE PHOTOS F TO THE
AIR TECHNICAL INTELLIGENCE CENTI -YESNO
10. 10. TRACK DATA: TRACK DATA:
WHAT WAS THE NUMBER OF THE TRACK? 090° 090
YES S NO SNO
11. WERE AIRCRAFT SCRAMBLED TO INTERCEPT THE TARGET? YES DNQ
TIME AS THE TARGET? TIME AS THE TARGET? YES NO
12. WERE ANY NEARBY RADAR INSTALLATIONS S QUERIED WHETHER THEY HAD OBSERVED QUERIED WHETHER THEY HAD OBSERVED
THE SAME TARGET OR TRACK? YES N YES
IF SO, WHICH STATIONS? IF SO, WHICH STATIONS? Kidskin Kidskin
13. 13. WAS THE TARGET OBSERVED ON SEARCH RADAR? WAS THE TARGET OBSERVED ON SEARCH RADAR? YES N YYES NO
EQUIPMENT? APG 4O FCS
14. WAS THE TARGET OBSERVED ON HEIGHT FINDING RADAR? YESN
IF SO, WHAT IS THE NOMENCLATURE OF THE EQUIPMENT?
15. HAVE THERE BEEN RECENT MAINTENA ULTIES? YESN
IF SO, DESCRIBE.
16. WHAT TYPE MODULATOR (I.E., SPARK GAP, HARD TUBE, ETC.) IS USED IN THE RADAR EQUIPMENT?
trstube triode
17. WAS THE AFC (AUTOMATIC FR TROL) CI BYES NO
COMMENTS:
18. HAS INTERFERENCE FROM ANOTHER RADAR SET BEEN OBSERVED RECENTLY: DYES NO
COMMENTS:
ATIC FORM 332 (REVISED 25 NOV 1952)

.
19. ARE PERSONNEL FAMILIAR WI SI GNAL? YES NO
COMMENTS:
20. ARE PERSONNEL FAMILIAR WITH THE EFFECTS OF ANOMALOUS PROPAGATION (DUCTING EFFECTS) AS THEY
PERTAIN TO THIS TYPE OF RADAR? YES NO
21. HAS ANOMALOUS PROPAGATION (DUCTING EFFECT) BEEN OBSERVED
GROUND CLUTTER OF THIS RADAR AT THIS SITE?YES 0 NO
COMMENTS:
22. WAS ANOMALOUS PROPAGATION (DUCTING EFFECT) EXTENDING THE RANGE OF THE GROUND CLUTTER AT
THE TIME THE TARGE BSERVED? 0 YES BNO
COMMENTS:
23. HOW DID THE TARGET APPEAR IN SIZE AND SHAPE AS COMP ARED TO CONVENTIONAL AIRCRAFT TARGETS?
T+ was
24. PERFORMANCE OF TARGET:
REMAINED CONSISTENT IN SIZE CHANGED SIZE RAPIDLY
. SPEED WAS CONSTANT SP EED WAS VARIABLE
C. FOLLOWED CONSIS ENT TRACK B. APPEARED, DISAPPEARED, THEN
REAPPEARED IN NEW LOCATION 0
d. FUZZY COMPARED TO AIRCRAFT SHARP COMPARED TO KNOWN
TARGET Br AIRCRAFT TARGET 0
•. SAME AS AIRCRAFT TARGET 0 6
25. WERE OTHER TARGETS (KNOWN) OBSERVED IN THE SAME GENERAL AREA, AT APPROXIMA Y THE SAME
TIME AND AT THE SAME ALTITUDE AS THE UNUSUAL TARGET? YESNO
IF SO, DESCRIBE. wene runnin
aca siwe ltitude. howsver our
26. WHAT TYPE INDICATC SA* SCOPE, B" SCOPE E
"B"
DESCRIBE E SIGNAL: I7 wa
su sight
4 the sevep ssto
28. WHAT WAS THE FREQUENCY OF THE TRANSMITTER?
9375 me.
29. DID ANY OF THE OBSERVERS HAVE ANY OPINIONS AS TO THE NATURE OF THE TARGET? YES NO
IF YES, GIVE THEIR NAMES AND OPINIONS BELOW.
ATIC FORM 332 (REVISED 25 NOV 1952)

on 21 October 1955
2. malvaia of in in
ATIMX to Minneapolia Minneapolis ared ared the time of sightings revealed the time of sightings revealed the presence of
... unumially strong trepepauss (temperature trepepause (temperature inversion) frcm the altitude inversion) from the altitude
h=1h-N10=4 0f93,800* 0f33,800* to 39.200*. 39.20e*. Also, another t Also, anether temperature inversion of less temperature inversion of less
insemsity of 4.980*.
3. Ater eouniceration of the statemants of ths daration
of the sightings and the existance of a prunotnsed iuversion, this case -
ATIR hae bees evalusted ad a PhoRAWs OprIeAL AsD EEcEreNIG refleatios dne ha bees evalusted aa a PhoRAWs OprIeAL AsD FEcEseNIG refleatios dne
tometeoralogical eoaditiome. to metecralegical ecnditione.
FOR THE COMMANDER
ATIS
MARY L. STORM
1st Lt. USAF
Assistant Adjutant
OINTHAYE
OTHERS
515 PERM__TEMP. RETENTION PERIOD
DESTROY
RETIRE
ATIC FORM 144 (REV 1PER 55) ROUTING AND COORDIN TION SHZET FILE AUTHORITY

30. IF SCOPE PHOTOS ARE NOT AVAILABLE, PLOT THL TARGET TRACK AS ACCURATELY AS POSSIBLE. GIVE
THE TIME AND ALTITUDE (IF MEASURED) FOR EACH POINT PLOTTED. PUT THE NECESSARY RANGE SCALE ON THE DIAGRAM.
i
090 a90
X
imiles
……
ATIC FORM 332 (REVISED 25 NOV 1952)

(
;-**-
USE THIS DATA NOT COVERED BY THE QUESTIONS.
: We were oviginally munn
practice intencupst on a tg+ to
be at 25° + 7 milee The tgf was
originally contacted 2f 45° star board
4 7 miles. During this period I 223
on search perat About 10 to
V noticed xotice d the the tgt tgt
15 15 sees. secs. later lafer I I
torudcking the same same 22 with 2 range
toudcking
of 15miles. 15miles. I I traked it tracked it on on
hond control hand control for 2 a miles 4 a peniod a peniod
of asout 5 sees. then retunned
to the intencept,
ATIC FORM 332 (REVISED 25 NOV 1952)

25000 FT (C) N/A (D) STRAIGHT THEN 90 DEGREE TURN (E) INSTANT (F) -
TWO SECONDS (3) MANNER OF OBERSEVANCE (A) AIR VISUAL (B) NONE (C) FOX NNER O FOX
89 DOG AELE FOX 11322 2500 FT AHNNW, 280 MS P (4) TIME AND DATE OF 89.DOG 282 MS P TIME AND DATE OF
SIGHTING (A) 21/0200Z (B) NIGHT VISUAL (5) MSP APPRCACH (6) ID INFO
OF ALL OEJECTS (A) ) N/A (B) MILITARY, STECK LLIAM F. 1/LT 432ND
,
.
-
PAGE TWO RJEDNG 37A
FIS PILOT (7) WEATH AND WINDS ALOFT (A) 25,OZE.CEILING SCATTERED (BL
,000-3
GREE/79; 10,OCC/275 DEGREE/60; (C) NONE (D) NONE (E) 14,000 SCATTERED )

10,20x--300 ho
42,030-27)/60 (C)
CEILING NONE (D NONE 14.009 S ERED 22,000 SCATTERED (WX STATION)
IGHTER THAT
WAS BEING INTEROGATED (11) END OF MSG(12) NONE COMMENT WAS BEING INTEROGATED (11) END OF MSG(12) NONE COMMENT OF REPARING EPARING
a he
PAGE THREE RJEDNG 37A
OFFICER: CBJECT WAS REPCRTED TO KIDSKIN GCI STATION CONTROLLER 2/LT 14011*d1+ 1
FREDRIC W BUSCH WHO REPORTED THAT PAINT BREAK ON HIS SCOPE INDICATED
THAT THE OBJECT SEEMED TO DO ABOUT 100ZK. ONLY OTHER ACTIVE A/C IN THE
- AREA WAS A STRATO-CRUISER, 200K HEADING 180 DEGREES AT 50 MILES. LOCAL
RESEARCH AGENCIES FOR
WERE QUERIED NEGATIVE RESULTS PD END UFCE MSG.
BT
24/203 RJEDNG

(
13.
C
nuti Oc1 25 18 56'55
'
WPC116ENB055
PP RJEDWP
DE RJEDEN 89 3 4x2a
P251680Z 4 IL
TO COMDR ATIC
BT
/UNCL/AISOP 918 PD ATTN CLN AFOIN-4E4 PD.REF TT MSG OIN 5168 CMM FM
COMDR 31ST ADIV SNELLING AF STA MINN CMM DTD 24/2B32Z OCT.55 PD RE2 ATIC COMDR SIST ADIV SNELLING AF SIA MINN CMM DID ZAZ2OS2Z OCT:SS PD RET AIIC NNOI 79.NN01
FORM 332 PAREN ELECTRONICS DATA SHEET PAREN BE SENT ALL RADAR OBSVRS DATA SHEET PAREN BE SENT ALL RADAR OBSVRS I
C CONCLUSIONS CONCLUSIONS
AFTER
BT
25/16412 25/16412 OCT RJEDEN
-
(
.
+
TO

( ¸ 8497
: 4E4
ATIC Subject: Request for Additional Information fo8
OIN (28 Oct 55) lst Ind. 2.No
HEADQUARTERS 31ST T AIR DIVISICN (DEFENSE), Snelling Air Force Station,
Saint Faul il, Minnesota
TO: Commander, Air Technical Intelligence Center, Wright-
Force Base, ATT : A N-4E4, Ohio
Basic communication complied with.
FOR THE COMMANDER:
7hn & stukl
2 Incl
N/C N/C HOMER L. STANKS HOMER L. STANKS
Myor. USAF
Adjutant Adjutant
4

AIR TECHNICAL INTELLIGENCE CENTER
WRIGHT-PATTERSON AIR FORCE BASE
OHIO
88 OGT195
T.
SUBJECT: Rcquest for Additional A Information
TO: Commander
3lst Air Division (Def)
Snelling Air Force Station
St. Paul, Minnesota
1 Reference , UFOB dated 24/2032Z
October 1955.
2. Request Lt. Donald E. Chanau, of the 432nd Fighter
Interceptor Squadron, be asked to complete the inclosed "Electronics
Data Sheet" in regards to the UFOB reported at 2l/ol40z October 1955.
5. Request Lt. William F. Steck, of the sane unit be asked to 5. Request Lt. William F. Steck, of the sane unit be asked to
complete the inclosed "u.S. Air Force Technical Information complete the inclosed "u.S. Air Force Technical Information Sheet" Sheet"
in regards to th e UFOB reported i at 21/0140z October 1955.
4.I 4. e forms, return same to the following
address:
Commander
Air Technical Intelligence Center B
ATTN: AFOIN-4E4
Wright-Patterson AFB
Chio
FOR DER um
E.E. DARVEAUX
Gept., USAF
Asst Adjutant
2 Incls
1. Electronics Data Sheet
2. U. S. Information Sheet

The information that you give will
be used for research purposes, and w regarded as confidential material. Your name will not
be used in connection with any statements, conclusions, or publications without your permission.
We request this personal information so that, if it is deemed necessary, may contact you for
further details.
1. When did you see the phiect? .Time of day: - 0200
Hour Minutes
¥0ra2$ SS
Month Year (Circle One): A.M 8 P.M.
3. Time zone: Eastern Daylight Saving
(Circle One): a.
b: Central b. Standard
C. Mountain
d. Pacific
e: Other Zuly
Where were you when you saw the object?
Aehoie Arehorn Hunsoapels Hintoacls Heha Hepa
Necrest Pastal Address Nearest Pastal Address City or Town State de Country
Additional romarke: Tuming ite Treff. Pttera Additional remarks: Turming mto Tref. Pettora
5. Estimate how long you saw the object.. - - 5
Hours Minutes Seconds
a. Certain c. Not very sure
.Fairly certain
Thin scaltered rves at 25,000
(Circle One): a. Bright daylight d. Just a trace of daylight
b. Dull daylight 5. No trace of daylight
c. Bright twilight t. Don't remember
7. IF you saw the object during DAy T, TWILIGHT, or DAWN, where was the SUN located as you looked at
the object? IVIA
(Circle One): a. In front of you d. To your left
b. In back of you e. Overhead
c. - To your right f. Don't remember
ATIC FORM NO. 164 (13 OCT 54)
INCL#2

Page 7
IF you saw the ouject at NIGHT, TWILIGHT, or DAWN, what did you notice concerning tho STARS and MOON?
8.1 STARS (Circle Ona): 8.2 MOON (Circle One):
. None . Bright moonlight
b. A few b.Dull moonlight
c. Many c. No moonlight - pitch dark
d. Don't remember d. Don't remember
9. Was the object brighter than the background of the sky?
(Circle One): .Yes b. No .Don't remember
(Circle One) a. A mile or more away (a distant car)?
b. Several blocks away?
c. A block oway?
d. Severa! yards away?
. Other
.Did the object: (Circle One for each question)
a. Appear to stand still at any time? Don't Know 1
Ye No
b. Suddenly speed up and rush away at any time? No Don't Know
c. Break up into parts or explode? Yoes Don't Know
d. Give off smoke? Yos Don't Know
. Change brightness? 9:00 Don't Know
f. Change shape? Yes Don't Know
g. Flicker, throb, or pulsate? Yes Don't Know
Did the object move behind something at anytime, particularly a cloud?
(Circle One): Don't Know. IF you answered YES, then tell what
Wos not a spotlijht as I especially To note of this.
(Circle One): Yes No. Don't KAow. IF you answered YES, than tell what -
it moved in front of: _
Did the object appear: (Circle One): a.Solid? b. Transparent? c. Don't Know.
1.Did you observe the object through any of the following?
a. Eyeglassas Yes Ne e. Binoculars Yes
b. Sun glasses Yes Ne f. Telescope $2121$
c. Windshield Yes No 8. Theodolite
d. Window glass Yos h, Other