proj_b1.pdf

BLUE BOOK 1 FEBRUARY 1966

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PROJECT BLUE BOOK 
The United States Air Force has the responsibility under the Department of Defense for the 
investigation of unidentified flying objects (UFOs). The name of this program, which has been in 
operation since 1948, is Project Blue Book. It has been identified in the past as Project Sign and 
Project Grudge. 
Air Force interest in unidentified flying objects is related directly to the Air Force responsi-
bility for the air defense of the United States. Procedures for conducting this pr~gram are estab-
lished by Air Force Regulation 200-2. 
The objectives of Project Blue Book…

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Identified reports are those for which sufficient specific information has been accumulated and 
evaluated to permit a positive identification or explanation of the object. 
Reports categorized as Insufficient Data are those for wHich one or more elements of informa-
tion essential for evaluation are 
mis~ing. Some examples are the omission of the duration of the 
sighting, date, time, location, position in the sky, weather conditions, and the marmer of appearance 
or disappearance. If an element is missing and there is an indication that the sighting may be of a 
security, scientific, techn…

Balloons continue to be reported as uros. Several tbousand balloons are released each day from 
military and civilian airports, weather stations, and research activities. There are several types of 
balloons - weather balloons, rawinsondes, radiosondes, and the large research balloons which have 
diameters up to 300 feet. At night, balloons carry running lights which cause an unusual appearance 
when observed. Reflection of the sun on balloons at dawn and sunset sometimes produce strange ef-
fects. This usually occurs when the balloon, because of its altitudes, is exposed to the sun. Large bal…

CONCLUSIONS 
To date, the firm conclusions of Project BlueBook are: (1) no unidentified flying object reported, 
investigated, and evaluated by the Air Force has ever given any indication of threat to our national 
security; (2) there has been no evidence submitted to or discovered by the Air Force that sightings 
categorized as unidentified represent technological developments or principles beyond the range of 
present day scientific knowledge; and (3) there has been no evidence indicating that sightings categor-
ized as unidentified are extraterrestrial vehicles. 
The Air Force will continue…

NON AVAILABILITY OF MATERIALS 
The following items are for internal use only and are not available for 
distribution to the public. These concern internal management'ind procedures 
for forwarding UFO reports to the appropriate agency: 
1. 
Air Force Regulation 200-2 
2. 
JANAP 146 
The Air Force has no films, photographs, maps, charts, or graphs of un-
identified fiying objects. Photographs that have been submitted for evaluation 
in conjWlCtion with UFO reports have been determined to be a misinterpreta-
tion of natural or conventional objects. These objects bave a positive identifi-
cation.…

SUGGESTED READING MATERIAL 
Books listed below deal with facts and theories about our solar universe, the sun, planets, comets, 
meteorites, the universe, stars, constellations and galaxies; telescopes, the computation of time as 
it relates to astronomy, star maps and charts, and the history of astronomy. 
SKY & TELESCOPE, by Sky Publishing Corporation, Harvard College Observatory, Cambridge, Mass. 
02138. Monthly Magazine, 60 cents per copy. 
WEATHER ELEMENTS, by BLAIR, published Prentice Hall. Has an excellent chapter on often mis-
identified weather phenomena. 
PLANETS, STARS, AND SPACE, b…

TOTAL UFO (OBJECT) SIGHTINGS 
(Compiled 17 Jan 66) 
TOTAL 
YEAR 
SIGHTINGS 
UNIDENTIFIED 
SOURCE 
1947 
122 
12 
Case FUes 
1948 
156 
7 
Case FUes 
1949 
186 
22 
Blue Book, page 108 
1950 
210 
2'7 
Case FUes 
1951 
169 
22 
Case FUes 
1952 
1,501 
303 
Blue Book, page 108 
1953 
509 
42 
Case Files 
1954 
487 
46 
Case Files 
1955 
545 
24 
Case Files 
1956 
670 
14 
Case Files 
1957 
1,006 
14 
Case Files 
1958 
627 
10 
Case Flles 
1959 
390 
12 
Case Files 
1960 
557 
14 
Case Files 
1961 
591 
13 
Case Files 
1962 
474 
15 
Case Files 
1963 
399 
14 
Case Files 
1964 
562 
19 
Case File…