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Categorizing UAP

What do you take note of if you see a UAP? See this excellent list below put together by Dan Warren from chapter 33 in a copy of a US Air Force Physics Book called “Introductory Space Science” used from 1968-1970 ( The list is also included in video 5 of 11 in Warren’s tweet below.


  1. Size
    • length
    • width
    • height
  2. Shape
    • oval
    • sphere
    • cylinder, etc.
  3. Luminosity
    • brightness, brighter than the moon, sun, etc.
  4. Color
  5. Number of UAP – a pair, three, swarm?


  1. Location
    • Bearing, range and altitude
    • How high in the sky, direction (going north to south, south to east), distance from you
    • Altitude – old astronomer tip: hold your fist as far from you as possible. The size of your fist represents approximately 10 degrees. If you put the bottom of your first on the horizon, then the top of your first represents approximately 10 degrees above the horizon.
  2. Patterns of Paths
    • zig zag
    • straight line
    • climbing
    • bouncing like a ping pong ball
  3. Flight Characteristics (wobbling, fluttering)
  4. Periodicity of sightings
  5. Time duration
  6. Curiosity or inquisitiveness
  7. Avoidance
  8. Hostility


  1. Electro-magnetic (compass, radio, ignition systems)
  2. Radiation (burns, induced radioactivity)
  3. Ground disturbance (dust stirred up, leaves moved, standing wave)
  4. Sound (none, hissing, humming, roaring, thunderclaps)
  5. Vibration (weak, strong, slow, fast)
  6. Curiosity or inquisitiveness
  7. Smell (ozone or other)
  8. Flame (how much, where, when, color)
  9. Smoke or cloud (amount, color, persistance)
  10. Debris (type, amount, color, persistance)
  11. Inhibition of voluntary movement by observers
  12. Sightings of “creatures” or “beings”


  1. Burned areas or animals
  2. Depressed or flattened areas
  3. Dead or missing animals
  4. Mentally disturbed people
  5. Missing items


  1. Sudden and instantaneous acceleration
  2. Hypersonic velocities without signatures (sonic boom)
  3. Low observability (hard to see, distorted)
  4. Transmedium travel
  5. Positive lift
  6. Biological effects (radiation burns)

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