This game can be played in teams when drinking. You line up a shot for every possible “Hit” on a ship. Each player takes turns guessing a square on the board every time that a player misses they must take one drink. If a player’s ship is hit they then take a shot of choice. To keep it interesting it’s good to have a different shots for each ship.
At any point during the game (even if a ship has been hit) if a player drinks their entire drink all at once they are allowed to move one ship on their board.
The losing player must finish their entire drink and also the shots the opposing player still has left over.