fire ship

The burning of HMS Royal James at the Battle of Solebay, 28 May 1672

A fire ship or fireship is a large wooden vessel set on fire to be used against enemy ships during a ramming attack or similar maneuver. Fireships were used to great effect against wooden ships throughout naval military history up until the advent of metal-hulled ships; they could also serve a considerable function in shock and awe strategies to harm the morale of enemy crews. Ships used for fireship tactics were typically purpose-built or retrofitted from surplus or obsolete vessels, either of which could be filled with gunpowder or other combustibles before a battle, but could also be improvised from warships in active combat purposely set on fire during engagements, such as if a vessel expended its munitions or had some other reason to be abandoned in battle.