Triangle shaped vessel with dim white lights on the corners and a single red blinking light in the center

3:30 am and I could not sleep because of the 30 MPH wind gusts. I look out of my window and witnessed a low flying large triangle shaped vessel with dim white lights on the corners an a blinking red light in the center. I am USCG captain and thought it was very strange a craft could be flying in the wind conditions and that low (500'). I could believe what I was seeing so I got closer to the window and watched is slowly fly by. The craft was coming from the north over the Chester River and continued to the south. I did not hear and sound from the craft.