UFOB - The Black Vault

PART I
FOI.U>W-UP INVESTIGATIONS
An UFOO report is worthy of follov-up investigaUon 1fhen it conta:1na
~ormaUon to s ugges t that .. positive ident1f'i catioD Vith a well
known pbenOlllBnon 1lB;Y beDl8de or 'IIben it cberacter1zes ail WlUBual. pbenOlDenon.
Tbe ,report s hould suggest allIIost ~ately ,
larply b;y the cober• . ncyand
, clarity of the data, that there is something of identification value and/or
scientific value.
In general, reports which should be given consideration are those
which involve several reliable observers, together or separately, and which
concerD sightings of greater (iurat1on than one quarter minute. Exception
should be made to this when circumstances attending the report are con- "
sidered to be extraordinary.
Special attention should' be given to reports which,give promise of a ...
\
-tu" on the poBit1on and to those reports involving UIlUBual trajectories. ,:
RULES OF THUMB
Every UFOB case should be judged 1nd1v1dUa.u.7 . but there are a number
. . .
of "rules of thumb," under each of the following headings, vIrlch should ' /
prove helpful 10 det ermining the necessity for fallaw-up inveetigation.
1. Duration of Sighting
1Iben the duration of. II. s1.ghting is 1eBs th8n 15 secODds, the
probabHit1ss are great that it is not worthyof' :rollow-up. 'lI.a a word
ot: ceution, hovever, should 8 large number of individual. observers concur