Bombs

Bombs are ammunition used with Cannons. To use them you need the Cannon Mastery in a pirate and place the bombs in your ship. The pirate will automatically pick up a bomb, place it in a cannon and fire it, but only if there are hostile enemies in the island/ship (You cant use cannons on a neutral encounter until someone of your crew enter the ship).

If a bomb hits another bomb in the ship, the ammo will explode. So its recommended to have the least possible amount in your ship at once.