JR Potts, AUS 173d AB (Updated: 6/29/2016):
Known formerly as the CVH Hyuga DDH-181, the vessel can support up to 11 navalized helicopters and (some sources state) as many as 22 "jump jet" type aircraft, presumably the up-and-coming Lockheed F-35 Lightning II Joint Strike Fighter (JSF). She maintains a flush landing deck and starboard side island superstructure which makes her appear as a conventional aircraft carrier - or helicopter carrier in the least. Her standard air wing consists of three Mitsubishi SH-60K helicopters (based on the American Sikorsky S-70) and produced locally by Mitsubishi though with Japanese avionics and equipment for specialized search and rescue functions. Additionally, she carries one AgustaWestland MCH-101 Anti-Submarine Warfare (ASW) utility helicopter. When fully loaded, the Hyuga displaces at 18,000 tons or more and can make 30 plus knots. The speed maximum was accomplished by using a COmbined Gas turbine And Gas turbine propulsion system (COGAG) for ships using two gas turbines connected to a single propeller shaft. A gearbox and clutches allow either of the turbines to drive the shaft or both of them combined. Fuel efficiency is obtained when the smaller turbine system is near the its maximum setting.