Ulsan is a class of multi-purpose missile frigates built for the ROK Navy between 1980 and 1992 with a total of 9, and one in service with the Bangladesh Navy. Currently, there are four ships in active service with the Republic of Korea Navy, while the remaining ships were decommissioned from 2014 to 2019 respectively.The Ulsan class has three variants: Flight I, with only one ship, followed by Flight II with four ships, and finally Flight III with the final four. These are multi purpose frigates with varied capabilities for ASW, ASUW, and AAW. These are the first frigates designed and built by South Korea, by four different ship builders.