i was sitting with my girlfriend who is a pilot// i am ex military.. and i noticed a small group of what i thought were led lights. i told my girlfriend right always and she was shocked to see what we were witnessing. the object went into the air about 8-10 feet .....at eye lever for us.... and started to move across the river changing direction in a zig zag pattern. after of about three minutes the object was about 20 feet from the other side and did a noise dive into the water and vanished. i wasn't sure what i had seen and neither was my girlfriend. i'm just glad some else was there so i didn't sound crazy. can anyone explain what this was?