Panokseons had on board several varieties of cannon, such as those named Heaven, Earth, Black and Yellow. Heaven was the largest cannon with the greatest range and the most common cannon on the ships. Earth was a smaller cannon and Black and Yellow were smaller still. The Heaven cannon fired "daejŏn" (a long, thick arrow in the shape of a rocket) with a range of , as well as "jeolhwan" (cannon shot) which could travel up to a distance of . Wangu, a kind of mortar, which fired stones or shells with a radius of , was also used by the Korean navy. Hwachas were also used on panokseons.