Pirate Fashions has its own supply o' Cannon for yar ships! When we talk about cannon it be important to remember that the second ye put'em on a ship they are henceforth referred to as guns. Take fer example the Swivel Gun! It's a small cannon that be designed fer ships n' gun emplacements.
Swivel Guns themselves be a convenient weapon, unlike their larger counterparts they were mounted on a stand or fork that allowed them to "swivel" n' turn in a wide arc. They were small enough that they could be taken ashore by a 2-3 man team, n' used in impromptu land based combat or fortifications. Ye could even mount one on a longboat as ye escape a ship or make your way to a hostile coastline!
A breech loaded gun could be fired in relatively rapid succession using canisters of prepared blackpowder n' projectiles called Mugs. One pirate could feasibly use a swivel gun independently to wreak havoc on sailors aboard enemy ships, they made deadly anti-personnel weapons fer tightly packed groups aboard a deck. A muzzle loaded swivel gun was still quite a force to be reckoned with!
Check out Arrr Supply o' Cannon n' start building up yar Arsenal!