The Type 054 is considerably stealthier than all previous PLAN frigate designs. The YF-23 was stealthier and faster, but less agile than its competitor. The YF-23 design was stealthier and faster, but the YF-22 was more agile. The YF-23 was stealthier and faster, but the YF-22 was more agile. The second concept model displaces 5100 tons and features a stealthier design than first. These were believed to be more sensitive and perhaps stealthier than RHYOLITE/AQUACADE. Dubbed "The Corpse", members forsake their rings for stealthier powers provided by the Guardians. A new modified smokestack and other improvements were also introduced to make the "Atago"s stealthier. Yakovlev proposed the Yak-43, an upgraded Yak-41 with a stealthier design and more powerful engines.