I looked out of window and saw a shooting star, but then about a minute later it came back from the same direction it went in

I was looking out to sea from the ship when I saw a shooting star, but then a minute or so later it came back the same route it left in , stopped a short distance from the ship in the sky high up, all I could see was a bright single light. It did two or three short erratic darts across the sky back to the same spot and the shot off across the sky past the front direction the ship was facing. Then about half an hour or so later the same light came back and did the same thing but flew around a bit more into the distance and back, the vanished. The light that was next to me the came on . I then went out onto the deck to see if I could spot anything else. Then strangely something flew past the ship very fast just above the water, as if it was going to dive in, the were no lights that I could see, but I could make out a craft shape even though it was dark there was illumination from the ship lights.