The incident began with phone calls from two civilian. At about 10:05 p.m., a woman, called from nearby Silver Glen Springs to ask if the installation was shooting off flares. She had just seen mysterious lights and wanted to know if they are flare. The duty officer, SK-1 Robert Clark, assured her no such operation was going on at that moment. A second call came a few minutes later. A man, later identified as Rocky Morgan, said that he and seven other persons traveling on Highway 19 near Silver Glen Springs had just seen an oblong-shaped flying object, some 50 to 60 feet in diameter and "almost the color of the moon," pass over the top of his car. It had a flashing light which was intensely bright at its center.
Clark checked with the Jacksonville Air Route Traffic Control Center, which told him no aircraft were in the area. He and the base air controller, Gary Collison, climbed up an observation tower next to a van containing the base's radar equipment. Clark contacted external security and directed them to contact TD-2 Timothy Collins, a radar technician. Collins rushed to the tower. The personnel already there were watching a cluster of glowing lights off to the west-northwest. They were at eye-level and seemed to be just above an old Civil Defense tower three miles away. Even though it was a clear, quiet night, the witnesses heard no noise emanating from the lights, which apparently were attached to a single object.
After watching them through binoculars, Collins went down to warm up the track radar, which took five minutes, and the acquisition radar, which took 20 minutes. As he waited, he looked for the object with a periscope on the van and saw it again. At around 11:20 radar locked on to the target. The object was located at 0.2 degrees elevation, or just a hundred or so feet off the ground, at the assumed distance: "treetop level," Collins would say. Its image on radar was "as strong [as] or stronger than" the image of the tower. The object seemed to be the size of a jetliner.
Ten to 15 minutes later it abruptly vanished from both sight and radar. But at around 11:40 the same or a similar object appeared 15 degrees to the north. Collins located it visually, but the second, computer-assisted radar did not track it for some reason. He also saw it through the periscope. A few minutes later it disappeared suddenly from both instrumented and visual observation.
Around midnight it or another object was seen three miles to the northwest. For five seconds it moved at more than 500 knots on a course, then accelerated for two seconds, and executed a hairpin turn in one second. When it made that turn, it was 15 miles south of the base, which meant it had covered 15 miles in seven seconds; most of that distance was covered in the last two seconds (a speed of 7700 mph is required to cover this distance in that time). The turn was a radical reversal of direction; now the UFO was shooting northward and toward the observers at the base. Its speed had slowed almost instantaneously to a mere two knots. It was at this point that Collins's radar locked on to it. After a little more than a minute, the object vanished. The sighting was over.
A dozen or so personnel had seen the object or objects. One of them, TD-AA Carol Snyder, told a newspaper reporter, "We saw three very blurry lights: red, white, and green. We watched them for about 30 minutes. We couldn't see how fast they were traveling. We were holding the binoculars, and the lights appeared to be bouncing."
The Navy conducted an investigation out of the Jacksonville center but came to no conclusions. Allan Hendry of the Center for UFO Studies interviewed several of the witnesses and gathered radar, meteorological, and astronomical data. He considered, then rejected, various prosaic alternatives before declaring this a CUFOS case of "high merit."