AN Rating
Classifies any anomalous behaviour.
- AN1
Anomalies with no lasting physical effects. Light phenomenas and similar.
- AN2
Anomalies with lasting effects. Like crop circles, pieces of material or poltergeist.
- AN3
Anomalies with associated occupants or entities. Like aliens, spirits, ghosts, yetis and similar legendary entities.
- AN4
Witness interaction with entities like the ones in AN3. Near-death- and, Out-of-body-experiences and religious miracles.
- AN5
Anomalous reports of injuries or deaths. Like unexplained wounds/healing of wounds or spontaneous human combustion.
MA Rating
Describes the behaviour of a UFO.
- MA1
A visual sighting of a UFO wich travels in a discontinuous trajectory. Loops, quick turns and vertical raise/drops.
- MA2
A visual sighting of a UFO wich left physical evidence. Like burn marks or material fragments.
- MA3
A visual sighting of a UFO plus observed occupants or entities on board or in direct assocation with the UFO.
- MA4
Manoeuvres accompanied by a sense of reality transformation for the observer.
- MA5
A manoeuvre that causes permanent injury or death of the witness.
FB Rating
Fly-by rating.
- FB1
A fly-by of a UFO travelling in a straight line across the sky.
- FB2
A fly-by of a UFO travelling in a straight line leaving some kind of physical evidence.
- FB3
A fly-by of a UFO travelling in a straight line across the sky were entities are observed on board.
- FB4
A fly-by were the witness experienced a transformation of reality into the object or its occupants.
- FB5
A fly-by that causes permanent injury or death of the witness.
CE Rating
Rating of Close Encounters.
- CE1
A visual sighting of a UFO within 500 feet.
- CE2
A visual sighting of a UFO within 500 feet that leaves somekind of evidence like landing marks or injuries to the witness.
- CE3
Avisual sighting of a UFO with entities aboard.
- CE4
Abduction of a witness.
- CE5
Abducted witness that suffers from permanent psychological injuries or even death.
SVP Rating
A three numbered rating of credibility. The first digit is the source credibility, the second for site visit and the third for possible explanations.
Source Reliability Rating
- 0
Unknown or unreliable source.
- 1
Report attributed to a known source of unknown or uncalibrated reliability.
- 2
Reliable source, secondhand.
- 3
Reliable source, first hand.
- 4
Firsthand personal interview with the witness by a source of proven credibility.
Site Visit Rating
- 0
No site visit, or answer unknown.
- 1
Site visit by a casual person not familiar with the phenomena.
- 2
Site visited by persons familiar with the phenomena.
- 3
Site visit by reliable investigator with some experience.
- 4
Site vist by a skilled analyst.
Possible Explanations Rating
- 0
Data constsistent with one or more natural causes.
- 1
Natural explanation requires only slight modification of the data.
- 2
Natural explanation requires major alteration of several parameters.
- 3
Natural explanation requires major alteration of several parameters.
- 4
No natural explanation possible, given the evidence.
The Vallee Classification System
Invented by Jaques Vallee