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Table 2: Disc/Saucer Observable Details Size Generally, range from a few meters to over 20 meters in diameter. Speed Exhibits capabilities for both hovering and high-speed flight, often making sudden sprints. Signatures Radar detection varies, visual sightings more common. Some reports include a humming sound. Colors Metallic silver or gray is common, though some have been reported as emitting light or changing color. Surface Details Variations include smooth, featureless surfaces to those with visible domes or segmented panels. Behaviors Sudden vertical ascents, hovering, and silent operation. Some reports indicate the ability to become invisible or blend into the sky. Unique Emissions Instances of electromagnetic interference in nearby devices and vehicles. Atmospheric Phenomena Visual disturbances, such as shimmering air or sudden fog formation.