Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects)

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----------------------
Total Less Unknown
Unknown
Per Cent
Per Cent
40
35
30
25
20
15
IO
5
0
0
5
IO
15
20 2 5
30 35
40
I
I
I
I
I
I
I
I
I
-
-
Stationary
Less than
100 mph
100 to400
mph
More than
400mph
Meteor-Ii ke
Not stated
I
I
I
I
I
I
I
I
I
-
-
(1,1
0)
FIGURE 20 COMPARISON OF KNOWN AND UNKNOWN OBJECT SIGHTINGS BY SPEED, 1947-1952
A-7491