For a later ship of the same name see HTMS Tachin (PF-1) HTMS Tachin (Thai: ร.ล. ท่าจีน) was a Royal Thai Navy sloop and training ship, built by the Uraga Dock Company in Yokosuka, Japan. Her sister ship was HTMS Maeklong. The ship is named after a river, Tha Chin River.