The Boom is yet another Arabo-Indian trade ship, also called Bhum, it was probably of Iranian origin. Larger than the Sambuk, with a long sloped stem and pointed prow. It was characterized also by bridge lightly elevated fore and aft. On this rear part was located the poop deck with a serie of cabins in largest ships. The prow figure was a rosace style ornament, usually painted dark. There were two masts, one quite large, which could reach about 30 m high, with a lateen sail.