This system of classification was developed by Dr. J. Allen Hynek. There are two major types of sightings, each divided into another three. There first two categories are based on distance the UFO was seen.
Nocturnal Lights: These are strange lights seen in the night sky, usually with unusual features like changes in the intensity of light or colour and changes in speed and direction.
Daylight Discs: These are distant objects seen in the day. They range in shapes like spheres and discs.
Radar-visuals: These are distant UFOs recorded simultaneously on radar and coincides with visual reports.
This is Dr. J. Allen Hynek, an astonomer who is the director of the Centre for UFO studies, U.S.A..
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Close Encounters Of The First Kind: There are observations of UFOs with no physical interaction between the witness and UFO.
Close Encounters Of The Second Kind: There are physical effects on animate and inanimate matter. For example, scorched or flattened vegetation, broken tree branches, frightened headlights and electrical failure. Usually electrical equipment will work normally when the UFO has gone.
Close Encounters Of The Third Kind: This is when there are 'occupants' reported in or near the UfO.
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