designated fire ships in the game should have fuse timer to go off (special button when it is time to go on fire) and only 2 guns   the designated fire ships where mostly with a few people sailing and limited guns (they where taken off the ship for that reason) it where even sometimes specially fabricated upgraded ships and had even a door on the side (and a small escape sloop to disembark)to escape when the ship was put on fire   https://en.wikipedia.org/wiki/Fire_ship#/media/File:Brulot1