The Solgae 631-class LCAC, often called Solgae class after the name of lead ship, is an air-cushioned landing craft (LCAC) designed for the Republic of Korea Navy. Built by Hanjin Heavy Industries, they're designed to operate from the ROKS Dokdo and the future Dokdo-class amphibious assault ships. This project was known as the LSF-II or Landing Ship Fast-II during development.