River class may refer to: Destroyers , ships of the Royal Navy built in the early 20th century that served in World War I , ships of the Royal Canadian Navy that served in World War II , frigates built for the Royal Australian Navy post World War II , ships of the Royal Australian Navy that served in World War I Other ships , ships of World War II built for the Royal Navy, Royal Canadian Navy and other navies , former ships of the Royal Navy commissioned in the 1980s , ships of the modern Royal Navy , ships of the interwar Royal Navy that saw service in World War II , ships of the South African Navy Railway locomotives River class locomotive (disambiguation) See also International Scale of River Difficulty