Lanong were large outrigger warships used by the Iranun and the Banguingui people of the Philippines. They could reach up to 30 m (98 ft) in length and had two biped shear masts which doubled as boarding ladders. They also had one to three banks of oars rowed by galley slaves. They were specialized for naval battles. They were prominently used for piracy and slave raids from the mid-18th century to the early 19th century in most of Southeast Asia. The name lanong is derived from Lanun, an exonym of the Iranun people.