Step 13: Magnets
You will need 9 ports evenly spaced around the edge of the board.
I used foil triangles (do not glue!) to visually space them and drilled out a small indention for the magnets to fit.
Make sure all the magnets are facing the same way so your boats and ports aren't repelled when you try to play later.
Glue the magnets into the holes and put a nice amount over the magnet as well.
Let the glue dry and touch up the paint.