For my own version of Battleship, I have included a weapon system.
The standard way of attacking,you just do what you usually do in battleship,just say the letter/number you want to hit.
The cannon is you get 2 blocks ( 1 forward from the one you wanted to hit, if there is no block next to the block you hit,you don’t get an extra hit). Just say ” Cannon Letter/Number”. You only get three of them.
The Middle makes the entire ship get destroyed. You only get one of them.