The power switch can be found on the half-sunken ship to your right when you begin. The boat that covers the entrance is 500 points. When you go up the ship's side, proceed straight until you see a stairway to your left leading upstairs, which is worth 750 points to enter. Once inside, go to either the right or left of the cabin and go inside, where you will find a stairway leading up again. Go up and move around the room to find a door worth 750 points. Open this to find the power switch to your right when you walk in.