The final carrier of the class, "George H.W. Bush", was designed as a "transition ship" from the "Nimitz" class to the replacement . "George H.W. Bush" incorporates new technologies including improved propeller and bulbous bow designs, a reduced radar cross-section and electronic and environmental upgrades, the ship's cost was $6.2 billion. The earlier "Nimitz"-class ships each cost around $4.5 billion. To lower costs, some new technologies and design features were also incorporated into , the previous carrier, including a redesigned island.