The Rattanakosindra class gunboats were a pair of Thai warships built in the 1920s. Despite being classified as gunboats, they had a unique monitor-style design with a low freeboard and armored turrets. Initially designed with four 152mm guns, the armament was reduced to two single guns. The ships were heavily armored for their size and powered by oil-fired Yarrow boilers.

Both ships served during the Franco-Thai War and World War II but did not see combat. Sukhothai was briefly involved in the Manhattan Rebellion of 1951. After decades of service, both ships were retired and their bow garuda figures are now on display at the Royal Thai Navy Museum.