Cannonades

From BoardGameGeek:

Each player is the captain of a fleet of pirate ships, and their goal is to sink all of the opponents' ships – shooting cannonades, of course – and remain the only pirate still afloat. During your turn you can add ships to your fleet or try sinking those of your friends by shooting cannonballs at them. Simple? Yes! The game is explained in 30 seconds but finding and developing a strategy to have the upper hand might not be so easy! -description from the designer