The Type 22 (NATO designation: Houbei class)[5] missile boat is a ship class in the Chinese People's Liberation Army Navy. The first boat was launched in April 2004 by the Hudong-Zhonghua Shipyard at Shanghai. The boats incorporate stealth features and are based on Australian-designed wave-piercing catamaran hulls that are more stable than other fast missile craft in high sea conditions.[6] Approximately 83 of these missile boats are currently in service with three flotillas having been produced over a span of seven years.[1]