The Swivel gun was typically mounted on the rails of the ship. In times of need, the swivel gun could be mounted on a carriage fabricated by the ships Carpenter as my brass cannon is. Swivel guns could be used in many roles. In defense of the ship, to repel boarders or in an offensive manner clearing the decks of a ship to be boarded. They could fire solid shot and canister shot, the buck shot of the time. Lead, steel, stone and even broken glass or any combination there of. They could also fire a blank charge to signal other ships.
