CLAIM-216113reported
“The witness’s impression was of a dark gray or metallic flat underside. Using tree height, telephone lines and prior radar-speed experience, she estimated roughly 300-375 feet length, about 30 mph and approximately 50-75 feet above trees measured at 80-89 feet.”
Inside the U.S. Government Covert UFO Program: New Insights
SRC-002150 · uploaded PDF pp. 89-90; printed pp. 78-79