Saucer shaped object enters river.

This is a story that was told to me by my father, who would have been about 50 years old when this occurance happened. My father worked for a local paper manufacturer that is located on the James River. He was a shift worker and one night he was taking his break in a location that had a clear view of the James River. He said that he observed a saucer shaped object come down from the sky at a "moderate" rate of speed, hover just above the water for a few seconds traveling maybe a few hundred yards then dived into the water disapearing from sight. He told me it had lights but i cannot remember what colors he said they were. My father grew up on the river, living in a house boat as a child. He told me that he had seen this sort of thing happen quite often over the years. Sometimes the saucer would hover over the water for short periods, but this was the first time he had seen it enter the water.
Witness indicates that the date of the incident is approximate.  PD