Type V - Indistinct object
a - Extended, fuzzy diameter
b - Star-like, motionless object
c - Star-like moving object
Type IV - Object in continuous flight
a - Continuous flight
b - Trajectory affected by nearby craft
c - Formation flight
d - Zig zag trajectory
Type III - Distinct shape
a - Hovering between two periods of motion
b - Interruption of continuous flight (hovering)
c - Alters appearance when hovering
d - Swarming objects
e - Trajectory change
Type II - Object with vertical, cylindrical formation
a - Erratic movement
b - Stationary object with secondary objects
c - Object with secondary objects
Type I - Object near the ground
a - Near ground
b - Near water
c - Object appears to show interest
d - Object appears to "scout" a terran vehicle