Vallee Classification System

Classification of anomalies related to UFOs

1 2 3 4 5
AN
anamoly
FB
flyby
MA
maneuver
CE
close encounter
Sighting Physical
Effects
Living
Entities
Reality
Transform
Lasting
Injury

A NEW CLASSIFICATION SYSTEM: ANOMALIES, CLOSE ENCOUNTERS, MANEUVERS, AND FLYBYS

Confrontations : A scientist's search for alien contact. Jacques Vallee
Ballantine Books. New York 1990

(pg 236-242)

In order to encompass the full range of phenomena one finds in the modern literature, it is important to acknowledge that UFos are related in significant ways to other anomalies. It is the rule, rather than the exception, to find significant UFo sightings preceded or followed by other anomalies, notably of the poltergeist variety.

For that reason, I have found it useful to begin with a classification of anomalies into four groups that parallel Hynek's close encounter categories:

We now come to the UFO reports themselves, which I will divide, following Allen Hynek, into close encounters and distant sightings.

I see no reason to change anything to the classification of close encounters which is in current use, from CE 1 to CE4, although Hynek himself was not responsible for creating the CE4 category and was not especially happy with it. In recent years the need has become acute for a new category, CE5, which will encompass cases of close encounters in which the witnesses have suffered permanent injuries or other physiological effects.

The distant sightings, in my view, are best classified according to the apparent behavior of the object rather than circumstances independent of it, such as daylight or night, or radar rather than visual observation. Accordingly, I have found it useful to introduce two general categories called MA for "maneuvers" and FB for "flyby." Within these categories I have tried to give definitions that were parallel to those of close encounters:


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