Pinpoint the location of the opponent's fleet by assaulting the enemy territory with volley after volley of TNT. When you have found a battleship you can finish it off.

Naturally your foe gets his tries as well, so be sure to send him to oblivion before you run out of ships.

When your opponent places his ships, you can get an idea where they are located as he places them first and then fills in the remaining space.