Sighting time, date & location

On 10/15/1999 at 23:30 a Unknown was sighted in Geyserville, CA, United States.

Latitude: 38.7077778
Longitude: -122.9013889

The object was seen for 300 seconds/5 minutes.

Sighting Description:

Some sort of stealth helicopter like object with hardly any sound flew right over my friend and I.