PROJECT BLUE BOOK

1182
D001015018

.(
O UNCLAASRED
Incident 20o, a, b, c -- Crescont City, California -- 17 Ootober le48
This incident has I no astronomioal oxplanation.
Although the four obsorvers
roports are romrkably consistent. The
-I
minutos, too long to bo a meteor;
appoared to refloct sunlight vory strongly. The speed was grout but
not exoessive.
The bankins tu rule out the bal-
loon, unlsss this was a sucjectivo inpression causod by the turnins turning
of the balloon in the wind.

indorsenert dated 31 March 1l9.
2. The incident suanaries 173 through 233 have bear chaokod
againat routine weather-balloon ascents made by the Air Force, Navy
and feathe reau, nclosed,
Investigation Of Uni-
dentirled Aerial Objeota" dentified Aerial Ohjeots" chanrad as follows: chanrod as follows: Item 13, "Direotion
of Flight of Cbjoet," should bo olurifiod so that vartieal and hori- vartical snd hori-
sontal motions are distinguished if sontal motions are distinguished if possiblo, und possiblo, und so that motion is
spocified as the diroction towards which the objeot appears to move. spocified as the diroction towards which the objest appears to move.
"Rolativo to Radar Bettings" should irclude a statorent of "Rolativo to Radar Bettings" should irclude a statorant of tho the type of
radar aet usad.
POR POR T THE CHIEF, AIR WEATIER SEAVICE
131 W. A. West
? Inola W. A. MEST
1 - Inoident Sunmarios Lt. Col., USAP
2 - Coaments 173 thru 233 Adjutant General
a

170d
No. 200, Definitoly not weather balloon. Course
almost due North at all lavels. Only station southerly, wind
area is North of Crescent City. releasing balloon in this
8

199,202. 220 230, 240.
2. Nou-astrononloal other explanations
a. Balloons or ordinary airoraft:
3, 11, 22, 41, 42, 53, 54, 73, 81, 83, 91, 92, 113, 114, 115,
126, 131, 138, 141, 145, 155, 156, 157,159,160161,163,
169, 171, 173, 178, 180, 182, 188, 190, 194, 195, 196, 198,.
200, 201, 200. 201, 209, 210, 237, 239.
b$ Rookets, flares or falling Rookets, flares or falling bodies:
#4,5,6,7,8, W4,5,6,7,8, 9. 12, 13. 14, 15, , 15, 16, 25, 55 ,65, 78, 107
108, 109
Misoeliansous (reflections, auroral streamors, birds, ato.)a Misoelianeous (reflections, auroral strewmors, birds, ato.):
39, 89, 123, 9, 214, 221, 1, 221, 231, 234. 231, 234.
3. Non-astronomioal ident
a. Lack of evidence prsoludes sxplanationi
125, 127, 137, 139, 149, 150, 1 , 213,
229, 232, 233.
b. Evidancs offered suggests ro explanationa
#2 10, 17, 21, 29, 37, 40, 51, 62, 58, 61, 62, 64, 38, 71,
76, 76, 77, 79, 84, 105, 111, 122, 135, 151, 152, 154, 162,
168, 172, 176, 183, 186, 193,2 207,215, 223, 224, 225, 226,
227, 236, 241, 242, 243, 244, 134,

FORVICTORY
UNITED STATES COAST GUARD BUY UNITED
WAR STATTA
ADDRESS REPLY TO UNC FIED JONDS
STAMPS
REFER TO FILE
REPORT OF SIGHTING OF "FLYING DISOS" OR OTHER
PHENOMENA IN THE APT OSPHERE
Date of sighting _17 October, 1948 Time 4:10 P.M.
Location of sightng
in Crescent City, Calif.
Weather conditions Clear, visibility unlimited. Light Nw breeze.
OBJECT SIGHTED OBJEGT SlGHIED
Number One One Heading South Heading South easterly
Shape Shape Oval Oval Altitude Altitude Over 6,000 ft.
Size very large very large Maneuverability Good
Color Color Bright silvery Sound None
Speed Faster than a plane Faster than a olane Exhaust trail Exhaust trall None
T
WITTNESSES
Name Address Occupation
ACreszent City Fisherman
Crescent City Janitor
caseent City House W
Crescent City Barber
REMARKS
Wittnesses agree that the object sighted was not a plane of
any known type. hey agree Shat it seamed unusual 12 That ele
objeot was Tary
Signature X.20ilnd C
Ofricer in Charge 2
UNCLASSIFIED Grescent City Light Sta.

INCIDENT SUMMARY SHEET Incident No. a00
1. Date and Time of 17 Oct 148 16102
2. Where Sighted:
3. Observer's Position: ground
(i. e., ground, air, control tower, etc.)
4.
Occupation and/or hobbies: Grescent City, Calif.
5. Barber
6. Attention Attracted by: Glint of light
7. Number of Object(s) Seen:
8. Sice of Object(s): 25 feet long
9. Color of Object(s): silver
10. Shape (Sketch if Possible) eggshaped with fins
110 11 Nature of Luminosity: 3/3 3/s
(directed beam of light?) (directed beam of light?)
12. Altitude of Object: (5.000 to 25,000 feet) hought 10,000 ft. 10,000 ft.
(estimated) (estimated)
2 miles
13. 13. Estimated Distance of Object from Cbsorver: - was seen laterally
Estimated Gpeed at a 60° angle of alevation from horizon at a 60 angle of alevation from horizon
14. Estimated Speed of Object: 300 moh
15. Time in Sight: 2 to 4 nimtes 2 to 4 nimtes
16. Tactics: Made 1 ahort bank and then resned course then rea med coiras
17. Sound Made by Object(s): nons
18. Direction of Flight of Object(s) southerly
19. Agparent Construction: nickel plated
20. Effect on Clouds: Jone .
21. Exhaust Trail (Color of): Zone
22. Manner of Disappearance: Faded from view
23. Weather Conditions at Time of Sighting: Ceiling: Unlimited - visibility
20 miles millat - no vings being noticeabls
24. Peoiliarities Moted: Coject shaped like
25. Summary of Incident:
(See attached page)

Incident: 200
Crescent City, Cal if. About l6lo, 17 Oct 19hs whila at his home at
an estimated height of about lO,Cco ft wnich resembled a plane saw a silver colored object at
wings being noticeable traveling at high speed. bject was shaped like a bullet, no
The object had the aupearancs of being nickel-plated. No smoks However, a tail structure was visible.
or noise was noticeable.
recutation among friends is a man between 45and 50 yrs of age and has a good
and good character. and neighbors, is of average intelligence
Locel flight schedules revealed no known flights. No releases of
test vehicles in vicinity at the time.

INCIDENT SUMMARY SHEET
Incident No. 200a
1. Date and Time of Observation: 17 0ct 1948 - 1610
2. Where Sighted: Crescent Gity Light
3. Observer's Position:
(i, e., ground, air, Gontrd tower, ete.)
4. Name and Address of Observer: Grants Pass, Oregon
5. Occupation and/or hobbies: Hishernan
6. Attention Attracted by: sound which came from piper cub plans flying
7. Number of Object(s) Seen: in vicinity
r4
g. Size of Object(s): 3/3
9. Color of Object(s): silver
10. egg-shaped - similar to blimp
11. Nature of Luminosity: a/3
(directed beam of light7)
12. 12. Altitude of Object: 3/s a/s
(estimated)
13. Estimated Distance of Object from Cbserver: a/s n/s
14. Estimated Sreed of Object: 300 MPH 300 MPH
15. 15. Time in Sight: Time in Sight: 3/3 3/s
16. Tactics: 3/3
17. Sound Made by Object(s): Sound Made by Object(s): Jone Mone
18. Direction of Flight of Object(s) South
19. Apparent Construction: 3/3
20. Effect on Clouds: 3/5 - no clouds
21. Exhaust Trail (Color of): Lons
22. did not notice
23. CAVU - visibility 20 miles
24, Peculjarities Motod: No wings or tail structure
25. Summery of Incident:
(See attacned page)

Incident: 200a
At about 1610. 17 0ct 1948 Mn a fisherman, heard the
sound of a plane. Looking up he saw a silver-colored egg-shaped object
that had i the appearance of a small blimp traveling south at about 30
mmoh. Mo wings or tail structure was visible nor was there any smoke
visible. No noise was heard from the object. The sound which attracted
observer's attention came from a small piper cub type plane. Mr
did not watch to observe whers the object went.

4.
5. Occupation and/or hobbies: Dry Meaner
6. Attention Attracted by: glint of light
7. Number of Object(s) Seen: 1
g. Size of Object(s): Unknown
9. Color of Object(s): Sronca Color
10. Shape (Sketch if Possible) like small plane
11. Nature of Luminosity: reflected light
(directed beam of light?)
12. 12. Altitude of Objecti Altitude of Object: Between Z 20 and 25,000 ft
(estimated)
13. Estimated Distance of Object from Cbsarver: Estimated Distance of Object from Cbserver: 3/s 3/s
14. Estimated Speed of Object: Estimated Speod of Object: 3/s x/s
15. Time in Sight: 4 to 5 mimtes
16. Tactics: Made a 45° turn and bank to the right. then made sharp turn Made a 45 turn and bank to the right. then made sharp turn
to the south
17. Sound Made by Object(s): none
18. southerly
19. Apparent Construction: metallic
20. Effect on Clouds: 3/5
21. Exhaust Trail (Color of): none
22. gradually disarpeared
23. Weather Conditions at Time of Sighting: cerna
24, Peouliarities Notod: Mone
25. Surmary of Incident: (over)
(See atteoned page)

)
UNCLACSFIED
Inoidont 1s2 -- at soat $7≤°40, 36 42' N -- 15 Ootober 1948
Tho bearings and notion given in tiis re,ort by the baster
thoso of any celestial ob-
joct.
iron ths reyortod size tnd shape aid the statoment that
the objrct had a criht orntor, one cun surnise that it was s spheri-
cul -- prouably a balloon.
D D
IUNCLASSIFIED
7-3112

Incident: 200b
At about 1610. 17 Oct 1943 Mr aw a small
object resembl ng a small plare silver colored
S. E. of Batt-ry Pint, Creseent City. at an altitude between 2o and proceeding in a southerly direction
25.000 feet. The object remained in view for 4 to 5 mimutes. At one
time it made a 45 turn and bank to the right, a shary
came from the object as the sun hit the topside, the object then made a bright flash
sharp turn to the south and gradually disacpeared.
about 47 years of age. of good
He is considered reliable.

INCIDENT SUMMARY SHENT
Incident No. 2000
1. Date and Time of Observation: 17 Oct 1948 1610
2. Where Sighted: Crescent City, Calif -
3. Observer's Position: rwer d
(i, e., ground, air, control etc.)
4.
Occupation and/or hobbies: Crescent City, Calif
5. housewife
6. Attention Attracted by: Glint of light
7. Number of Object(s) Seen: 1
g. Size of Object(s): 17 small"
9. Color of Object(s): silver
10. 10. Shape (Sketch if Possible) Shape (Sketeh , If Possiole) elliptic elliptie
11. 11. Nature of Luminosity: Nature of Luminosity: reflected light as light against a mirror as light against a mirror
(directed beam of light?) (directed beam of light?)
12. 12. Altitude of Object: a/s
(estimated)
13. Estimated Distance of Object from Cbserver: Estimated Distance of Object from Cbserver: 3/s
14. Estimated Speed of Object: Estimated Gpeed of Object: "very fast
15. Time in Sight: x/s /3
16. Tactics: Made a sharp bank of about 45° to the right, resumed course
17. Sound Made by Object(s): none
18. Direction of Flight of Cbject(s) AkS Southerly
19. Apparent Construction: 3/S - presumably netallic
20.3 Effect on Clouds: 3 3/3
21 Exhaust Trail (Color of): none noticed
22.
23. CAVU
24
25. Summary of Incident:
(See attached page)

mimutes. It was traveling
a plane flying north. Shortly atter sighting, the object made a aharp
bank of about 45° to the right resumed its course, disaopearing
to sea. No smoke or noise was heard from the object. At all times
the object gave off a brilliant flash like that of snlight on a
glass mirror.
Mrs Vis 70 years of ege, of Swiss extraction, and is a long- -
time resident of Crescent City. She is of gverage intelligence,
and has a good character and recutation. She had no idea of speed,
range or altitude. She thought the object different than any other
airborne carft she had ever seen, The brightness of the object
impressed her most.

BASDNTIAL CLEEITS OF INORL-TION
(Re Sightings of Unidentified Aerial at thi
Cbjects)
UNCLASSI
FROJEOT "SIGIP"
1. Date of sighting. 17 Ootober, 1943
i Time of sighting
(Zonal by 24 hr clock) 1610
3. where sighted:
a Ground
(1) City, town Grescent City, California
(2) Distance and direction fram oity or town
road, intersecticns, ete. Two (c) miles South Last of
Battery Point
{3) (3) From Building (story), Yard, ete. From Building (story), Yard, ete. Yard
(4) Map coordinates showing Map coordinates showing latitude and lahgitude; lahgitude; Enclosed
6. b. Not applicable
o. Not applicable Not applicable
4 Rumber of objects. Bumber or objects. One (1) One (1)
a. Formation. Formation. None None
5. 5. Distance of object from observer. Distance of object fram observer. Two (3) miles Two (a) miles
Laterally.
60
c* Altitude. 5,000 to 25,000 feet.
S. Time in sight. -
I
INCL
200

P 2
BEI Froject "SIGN
7. Appearance of object.
a. Color. Silver.
bo Shape. Eecshiped.
c. Apparent construction. Solid.
d Size. about t twenty five (25) feet.long.
8. Direction of flight. Southerly.
9,
a Horizontal
20. Evidance of exhaust. None.
11. Effect on clouds. Clouds less one (1) percent Hone.
12. 12. Lights. Lights. None None
13. None seen. None seen.
14. Not discernable.
15. None.
16. tone visible.
17. Speed - MH Speed - MPH three hundred (300) three hundred (300) estimated
18. Sound. None None
19. none observed.
20. Manner of disappearance. Faded from view.
-2
200

Page 3
EEI Project "SIGN"
Relativs to the observer
1. Name of observer:
2. Address of observer: Crescent City, California
3. Occupation: Barber
40 Place of business: Central Hotel, Crescent City, California
a. Employee
5. and 6. Unknown
70 Reliability of observer:
a Source
(1) Neighbors: (l) Neighbors: Very good.
8. 8. on:
a 3 Unknown Unknown
b. b- How attention was drawn to object:
(l) Glint of light. (l) Glint of light.
9. 9. Witnesses: Same as observer.
lo. Comments of interregator re talligance and character of person
interregate.
, of averag
and good
doo
A

Page 4
EEI Project "SIGN"
Relative to the observer
l. Name of observer:
24 Address of observer: Grants Pass, Oregon
3. Occupation: Fisherman
40 Place of business: Same as address of observer
5. 8 and 6. Unknown
7. R Reliability of observer:
a Source
(l) Neighbors: (*)mosmo05. Very good vory 530d
8. 80 Notes relative to observer on:
a Sightings in general: Unknown Unknown
B. How attention was drawn to object:
(2) Glint of light
9. Witnesses: Same as observer.
l0g Comnents of interregator re intelligence and character of person
interrogate.
is about l9 years old, of good charscter, enjoys a good
ty, and is of average intelligence
tat he saw, assuming it wa9
200

Page 5
InI Froject "SIGir
Relative to the observer
2. Address: Crescent City, California
3. Occupations Dry Claaner
4 1 Flace of business: Vouge Cleaners, Crascent City, Californie
Employes
5.3 and a 6. U Unknown.
7. Reliability of f observer
2 Source
(1) Neighbors, very good
8. 8. Notes relative to observer on.
a Sightings in general: Sightings in general: Unknown
b. How attention was drawn to object:
(1) Glint of light Glint of light
9 Hitne33est ditnes3es:
Same as observer
10. Conments or interrogator intelligence and character of person
interrogated.
Ris a man about fourty seven (47) years of age, a long
resifent of Crescent City, California, of goog chagrachter and regutation
among his neighbors avera igence and considered reliable.
3
2oo

R
Page 6
EEI Project "SIGN"
Relative to the observer
1. Name of observer:
2. Address of observer: Crescent City, California
3. Occupation: Housewife
40 Place of busineas: Not applicable in this case
5. a and 6. Unknown
7. Reliability of observer:
3. Source
(1) Neighbors: Very good
8.
Sightings in goneral: Unknown Unknown
b$ How attention was drawn to object: How attention was drawn to object:
(1) (1) Glint of light
90 Witnesses: Witnasses: Same as observer Same as observer
l0. Comments of interregator re intelligence and character of person intelligence and character of person
interregate. interregate. 1
S
different then any other sirborne craft
brightness of the object
as though it was nickel plated.
200

Page 7
SEI Froject "sIoN"
Relative to Radar Sichtings
1. No radar sights known to be made
GENERAL
1. Teletype sequences or local weather conditions: None made this area.
2 Winds aloft report: None available.
a. Weather report at Crescent City, California airport at l530,
Ceiling; unlimited
Visibility; tyenty miles
Tompeture; 72 F.
Dew point; 48
Clouds; less one (l) per cent
Ground wind; Southwest five (5)
3. Local flight schedules (all types): Lone rone
4 Tossible releases bf testing devices in vicinity: Tossible releases bf testing devices in vicinity: Jone
5
5 5 Not applicable in this case. Not applicable in this case.
7. 7. None. None.
8. Signed statments enclosed.
9. lot applicable in this case. 8. Not applicable in this oase.
CECIL MAO LEOD, CBOSN, USCG
GROUP CCMAIDER
100

219, 238.
bo Fair or low probabilitys
19, 20, 23, 24, 28, 35, 35, 46, 50, C3, 67, 80, 82, 93, 1C0,
112, 120, 121, 129, 130, 144, 153, 165 166, 167, 175, 192,
199, 202, 205, 220, 230, 240.
20 Non-astrononical tut explanations
84 Balloons or ordinary airoraft:
3, 11, 22, 41,
126, 131, 138, 141, 145, 155, 156, 157, 159, 160, 161, 163,
169, 171, 173, 178, 180,(182, 138, 190, 194, 195, 196, 193,.
200, 201, 209, 210, 217 , 222. 235 237, 239,
b Kookats, flares or f falling bodies:
b5,7,8, 5,6,78, 9, 12, 13, 14, 15, 9. 12, 13, 16, 25 . 56, 65, 78, 55 65 106, 107, 106, 107,
108, 109, 13 108, 10 8.
0. Miscellansous (reflections, auroral streamers, birds, eto.): Miscellansous (reflections, auroral streamers, birds, eto.)
39, 89, 123, 124 59, 89
a3m Hon-astronouioal, erident
a.s Lack of evidence pracludes explanation:
125, 127, 137, 139, 149, 153, 177, 179. , 206, 212, 213,
229, 232, 233.
b. Byidence offered suggests no oxplanation:
, 39, 37, 40, 51,, 62, 61 , 51, 62, 64, 63, 71,
75, 76, 77, 79, 84, 105, 111, 1 122, 136, 151, 152, 154, 162,
168, 172, 178, 183, 186, 193, 207, 215, 223, 224, 225, 226,
227, 236, 241, 242, 243, 244, 134.

-
L
Shortly after sighting, the plane or object made a sharp bank of le a sharp bank of
about 45 Oto the right then resumed her course, disapearing to
times the object
gave off a gave off a brilliant flash as from the
19
CERTIFIED TO BE A TRUE COPY
ORIGINAL.
CECIL MAC BOSN, USCG
I00

Grants Pass, Cregon
10 December, 1948
STATEMENT OF
At about 1610, 17 October, 1948 while at Crescent City Light Station
see where it want.
CERTIFIED TO BE A TRUE COPY
OF THE OF THE RIGINAL.
CECIL MAG LEOD, CBOSN, USCG
200

Crescent City, Cal.
10 December, 1948
STATEMENT OF
and
heard. heard.
CERTIFIED TO BE A TRUE COPY CERTIFIED TO BE A TRUE COPY
OF THE ORIGINAL.
CECIL MAC LEOD, CBOSN, USCG
200

Crescent City, Cal.
10 December, 1948
STATEMENT OF
At about 16l0, 17 October, 1948 while in my garden on
Crescent City, Cal. I saw a small silver colored object resembling a
five
No smoke or sound came No smoke or sound came from this object. from this object.
CERTIFIED TO BE A TRUE COPY CERTIFIED TO BE A TRUE COPY
OF THE CRIGINAL. OF THE CRIGINAL.
CECIL MAC LEOD, CBOSN, USCG
200

UNITED STATES COAST GUARC
COMMANDANT ADDRESS REPLY TO: COAST UNCLASSIFIED
U. S. COAST GUARD HEADQUARTERS .8 November, 1943
WASHINGTON 25. D.C. g0 FILE: IIT 64 (R)
1AYO
From: Cormandant, U. S. Coast Guard
To: Comnanding General, Headquarters Air Materiel Command, U. S. Air
Force, Wright Field, Dayton, Ohio
Suoj: nerial
There is forwarded for your actior report from the Officer in Charge,
Crescent City Light Station, U. S. . Coast Guard, describing an unusual
17, 1948, at 4:10 F.M.
By direction of the Commandant.
B. R.LAN
Lieukenant, USCG Lieulenant, UScG
Acting
Incl
Report Report
DOWNGRADED AT B YPAN INTERVAL
DECLASSIFIED AFTER 12 YEARS.
DOD DIR 5200.10
288

ANC
Subject: Project "SIGN"
lst Ind MCIAXO/wS/aw
Dayton, Ohio NOV 23 1948
TO:
1. This Comrand is charged ith the investigation of all reported
sightings of unidentified aerial objects, In accomolishing such investi-
gations existing military investigative agencies are utilized. Iowever,
no known investigative agencies are located within the imnediate vicinity
of Crescent City, California, where sighting mentioned in basic letter
occurred.
2. The assistance of Coast Guard personrel is therefore requested
in conducting an interview of the irdividual witnesses who reported the
Crescent City sighting.
3. It is desired that 3. It is desired that pertinent questiors outlined in pertinent 5 questiors ontlined in inclosed inchosed
form, Essential Elements of foxm, Essential Elements of Information (EeI) be answered, It is Information (EEI) be answerod, It is
particularly important that information requested under information requested u neral" of eral" of
the attached form be obtained. the attached form be obtained,
L1. All persons All Dersons should be should be advised to avoid advised avoid publicity i publicity this
mnatter. matter.
5, Direct reply to Comanding 5, Direct reply to Commanding General, Hd, Air Materiel Command,
Chio, attention NCIAXO-3.
FOP TE COMMANDDIG TE COMMANDDNG GENERAL:
2 Inols H. M. McCOY
1. n/c Colonel, USAP
2. EEI Chief, Intel igence Departnent
DOFNGRADED AT S VEAR INTERYM
DECLASSIFIED AFTER 12 YEARS.
2 DOD DIR 5200.10
F
UNCLASSIFIEB
200

UNITED STATES COAST GUARD
COMMANDANT ADDRESS REPLY TO: STALES
U. S. COAST GUARD HEADQUARTERS December, 1948
WASHINGTON 25. D.C. FILE: IT 64 (R)
•
From: Commandant, U. S. Coast Gurd
To: Commanding General, Headquarters Air Materiel Coniand, U. S. Air
Force, dright Field, Duyton, Ohio
Subj: Kerial phenouenon at Grescent City, Calif.
1. Reference is made to your first indorsement dated 23 lovenber,
the subject, in which you transmitted copy of a form ontitled "Essential
Eleuents of Infornation" and requested that answers to the questions con-
tuined tlerein be obtained. In accordance with your recusst there is
inclosed a typewritten copy of the aforementioned form prepared by the Liclosgd a Gypemllcced coly Ol 6 s alsrelelclonel rolm Prepered by Che
reporting officer, together with statements of witnosses to the phenomenon.
2. Your file is returned hererith.
By direction of the Comnandant. By direction of the Commandant.
HOND OTD
LOK, LOK, USCG
Chief, Intelligence Chief, Intelligonce
& Law Enforcement Division & Law Enforcement Division
Incls
1. Report
2. Statenents of vitnesses
3. Your file
XCLA.. R(NTERVALS;
DOD UHRBM1O 4 12 YEARS.
UNCLASSIFIED
200

UNCLASSIFIED
A9
10IL/s/r
OUBJECT: Projeet "Sign" JAN 7 1949
TO: Chief of Navl Jperetions
lasiigton 25, D.
ATTN: ONI
20 This Gommand is reeponsible for investigation of all re-
ported sightiags of urddentile ects, couponly rererred
to as flyin W as Ilylnt"Dlmes. "dacs."
2. Several witnesses sightsd an object in the vicinity of Several ritresses sightad an object in the vicindty of
Cresgent City, Galifornis at Crescent City, Gallfor a at l61o 2 hours, 17 ctober 19bd. bjeet 1610 3 hours, 17 ct 1abd. Cbjeet
ras said to reaemole a semll was said to reaemole a smll lavy bliap althoug lavy bliap alt te apead and speed and
malweverability were thought to be too great.
3 It is reonested a Is is reonested a sehednle of lavy lignter-thanairerart senednle of lignter-than-airerart
movemants in the vieinity of Crescent City Californda, doring xovements in the rieindty of Crescent Giny Californda, doring the the
period 17 Idetober l9hd be furnished Gotober lghd be furnished tais Command to aid in the I tais Command to aid in the
240 Any addi tional pertinent inforaation and suggestions information and auggesdions
are requested.
50 I General, Air nteriel
attendon of KCIAxo-j.
FOR TH3 COmaMING 3 GENeral:
FERVAL3; He 3. secX
DOWNGRADED YEARS
DECLANN:" DOr 1.250.10 Colomel, USAF
2921 Chief, Intelligence Decartment
myand
UNCLASSIFIED

In reply refer o Initials for PEACE D
and No. OF
Navy Department MIND-
RJY
OP331B/1e OFFICE OF THE CHIEF OF NAVAL OPERATIONS SAVINGS
(SC)AL-3 WASHingtOn 25, D. C. BONDS
Serial: 031P33
27 JAN1949
From: Chief of Naval Operations.
To: Commanding General, Air liateriel Command
(Attn: MCIAXO-3).
Subject: Project "Sign".
Reference: (a) Commanding General, Air Materiel Cormand Itr
1CIAXO-3/HvS/rm of 7 January 1949.
1. 1. Reference (a) requests information concorning the Reference (a recuests intoratlon coi ncorning the
Navy's operation of airships on 17 October l9l8 in the vicinity of a vicinity of
Crescent Gity, California, Crescent City Lifornia,
2. 2. The Navy has not operated airships on the West Coast The Navy has not operated airships on the West Coast
since June 19h7. Therefore since June l9l7. I Therefore a l a Navy Blimp could not have been the
flying "disc" in question. flying "disc" in question.
3 For your information the following operators of
airships on the West Coast are listed: airships on the West Coast are listed:
(a) Goodyear Tire and Rubber Co. Inc.
Airship Advertising Operations
Wingfoot Lake Airship Base
Alron, Chio.
(b) Douglas Leigh Sky Advertising Corp.
630 Fifth Ave.
New York, N.Y.
(0) Hughes Aircraft Co.
Culver Cit aliformia.
DOWNGRADED AT MNchnan
DECLASSIFIED AFTER 12 YEARS. LRV.LS:
DOD DIR 5200.10
Byieo
UNCLASSIFIED

Inoident No. 186 -- 16 0ct. 194s, 1145 Hours, eight m1les 1
east ueah noise, thon saw .
Cne observer thick, and aix inches wido
one objeot 9 long, ther It was blaok with
traveling horizontally PH, 500 ft overhead.
a wide ailver stripe on urderside centar. Inveatigator states ob-
distances is poor In sight approxi-
server's ability to estimate
mately four sooonds. 3
Information ion.
A
5.
0 C
2

O UNCLASSIFIED
Inoident xl86 -- near Sterling, Utah -- 16 Jotober 1948
Thore is nothing astronomioal in this insident.
since the oljeot was in
sight just a rew soconds, even u conventional airoraft undor poou-
much more detailed osservation. nuchmoro ed osservation. Proba:ly tne distancs Ts grossry Prouatly t
underestimuted. underestinuted.
D
UNCLASSIFIED
7-3912-
10
3

00
With loh incidonts thus eliminatod, there remain thirty-four
which contain sone evidende but have no ngpirunt roady explanition.
Thio statonant is true only under the assuiption Bhit the ovidonce Is
aotopted as roliablo aid'acourato, When psychologioal and prysio-
Loplcal factors nro taken into cunsideration, all of Chesu ineirs.
crA he exoluined rationnly, as pointed ou; br Rund Ccrperatien
Dr, Fbcs of AIr Matoriel Command Aoromifedlonl. Leboratery (sne
d "g"),
Alr Natriel Dor:and Aero-adiarl Leeritry
42 Ineid nts coneiderod)
There are surticient peychologleal explanations for the regnt
inidoztifiod flying objoots to provide plrusiblo explamtions sorer
ports not otharwise explainablo. Mhssn errorn in idortifying oval
etimuli rosult ohiefly from inability to estimate speed, distates, e
3ize.
All of the reneinirg 34 inoidonta are trokted in dstail in thi
report. those incidents fora no pattern in rogard to aree of sl tht
wype of oojort, or nanner of porrormanso. Thoro are indieatiea
ovar, thni somd sightings vore influenbed by oarlior roporss
Probobly srould no' hve been cohsidored uaueual or report.d
Ssn nd Paoiigiwy saon nd Pabiioivy.
CETES
Prodeot dadgo Prodeot drt3o
Sany arto Belmion g haelndghparto any arto Eelmhton ge haelndrgiparto
VII. Sy  or No Frluaticn of Pereinior Roporte VII Ss z or No Eriuatica of Persininr Reporte
The remaiaing unoxplained incidents (seo Appondix nr') ext noxolained'incidents (see ,Appondix "p") ex
A odnkn dharioteristios. No of then, by statenents of the reper'.
ald not hare boon mado had the witnesnes not road of tho l't. tinl
inctdenb (taoidens lio. i7). Kost wore distributod without pattem
droughout the Vinited States. A few mere outsire the U. S. No two
cesoriptions of appeirance or perfornnnce wore exactly alike. The ro-
roed sight tnge ocourred nt varieus times of day and venr.
In ths following section of this roport, each romadning whoxplntn
Ineidont is oonsidored Separately, It is not the intent to gonerally diaredir
he charnotor of obsorvers, bit each case las undesirable elenents, and icss
Bonet be disragarded. The numerical designation is neruly the oatetar
Lor of the iraidont Ln the projeot rilos.
,7, 2, 3, 35, 37, 10, 51, 58, 62, 6, 63, 71, 75, 76, 77, 79, Bks
11, 123, 1 134, 135, 151, 152, 154, 262, 158, 176, 183, 6, 193, 207, 25, 060
77

indorsoment thereto his warters, dated 31 Maroh l)i9.
2, 2. The incident'sunnarios 17 The incident'sunnaries 173 through 233 have hrough 233 boer cheokod beer cheokod
Force, Navy
and Neather Bureau. Cocments based on this rovien ars inelosed, inclosed,
dentirled Aorial dentirled Aorial Cbjeots Cbjeots" changed as followsi changed as follows, Item 13, "Dirsotion
of Flight of Cojeot," should bo olurifled so that of Flight of Cbjeot," should bo elurifled so that vertieal and hori- vertioal and hori-
sontal motions are distinguished if possible, and gontal motions are distinguished if possible, und 3o that motion is 3o that motion is
spocified an ths direction towards which the objeet appears to spocified as ths direction towards whioh the objeet appears to movs.
"Relativs to Radar Settings" should irclude a statonant of tho "Relativs to Radar Settings" should irolude a statonant of tho type of
radar set ubed.
FOR THE CHEF, AIR WEATIER SLAVICE
131 W. A. West
2 Incla N. A. WEST
1 - Inoident Sumraries Lt. Col., USAP
2 - Contents 173 thru 233 Adjutant General

160348
No. lE6: Object reported moving direetly into headwind of 2OX. Only
possiblo woather balloon would have been moving SE from Salt Laks City.
If s speed is any criterion, this was definitely not a balloon.

Dr HYNEK'S EVALUATIONS EXTRACTED FROM PROJECT GRUDGE REPORT.
INCILENT INDEX
1. Astronomical
a. High probability:
26, 27, 30, 31, 32, 33, 34, 48, 49, 59, 60, 66, 69, 70, 94,
95, 96, 97, 98, 101, 102, 103, 104, 116, 119, 132, 136, 140,
147, 148, 158, 174
219, 238.
b. Fair or low probabilitys
F19, 20, 23, 24, 28, 35, 36, 46, 50, 63, 67, 80, 82, 93, 1C0,
112, 120, 121, 129, 130, 144, 153, 165, 166, 167, 175, 192,
199, 202, 205, 220, 230, 240.
2. Non-astrononioal tut suggestive o other explanations
A Balloons or ordinary airoraft: Balloons or ordinary airorafti
#3, 11, 22, 41, 42, 53, 54, 73, 81, 83, 91, 92, 113, 114, 115,
126, 131, 138, 141, 145, 155, 156, 157, 159, 160, 161, 163,
169, 171, 173, 178, 180, 182, 138, 190, 194, 195, 196, 198. 169, 171, 173, 178, 180, 182, 138,
200, 201, 209, 200, 201, 209, 210, 217, 222, 235, 210, 217, 222, 235, 237, 239,
3, Roakets, flares or Roakets, flares or falling bodies: bodies:
4, 5,5,7,8,9, 12, 13,14, 15, 4, 5,6, 7, 8,9, 12, 13,14, 16, 25, 55, 65, 78, 106, 107,
108, 109, 133,
3. Miscellaneous (reflections, auroral streamerx, birds, eto.): Miscellaneous (reflections, auroral streamerx, birds, ato.):
39, 89, 123, 124, 128, 146, 164, 181, 189, 214, 221, 231, 234. 3989,12 231, 234.
3 Mon-astrononioal, nation evident
6.- Lack of evidence preoludes explanationi
38, 44, 45, 47, 55, 57, 72, 86, 87, 88, 90, 99, 110, 117, 118,
125, 127, 137, 139, 149, 150, 17 213
229, 232, 233.
Bvidance offared sugzeats Do explanation:
#, 2, 10, 17, 21, 29, 37, 40, 51, 52, 58, 81, 62, 64, 68, 71,
75, 76, 77,79, 84, 105, 111, 122, 135, 151, 152, 154, 162,
168, 172, 176, 183, 185, 1 193, 207, 215, 223, 224, 225, 226,
227, 236, 241, 242, 243, 244, 134.