1. Scratch the TORPEDO ROOM to reveal 26 coordinates (letter-number combinations).
2. Scratch the corresponding location for those coordinates on the grid.
3. If you completely uncover any of the ships shown on the LEGEND, that ship is sunk. Win prize shown for that ship.
4. Completely sink all five ships and win $20,000.
5. Reveal a MINE symbol and win $5 automatically.
Overall odds of winning: 1 in 4.50