These 2011 CV 63 Kitty Hawk carriers are based on an improved Forrestal class design featuring improved elevator and flight deck arrangement. These 2011 CV 63 Kitty Hawk ships are larger than those of the Forrestal class and have two elevators forward of the island structure and portside elevator on the stern quarter rather than at the forward end of the angled flight deck. The John F. Kennedy has a number of modifications not inherent to the 2011 CV 63 Kitty Hawk and is therefore referred to as its own class. Both Kitty Hawk and Constellation were modernized under the service life extension program which extends their projected service life fifteen years beyond their original thirty year service life. America was not upgraded and was decommissioned in 1996.Each of the four catapults on 2011 CV 63 Kitty Hawk vessels is directly connected with one of the four main propulsion spaces. Each catapult has their own individual steam accumulator bottle, that needs to be between 510-530 PSI. One Main Machinery Room 2011 CV 63 Kitty Hawkprovides steam to the number one catapult; 2MMR provides for number three catapult; 3MMR provides for number four catapult, and 4MMR provides for number two cat. However,the catapults aren't exclusively powered by its coinciding MMR. If needed any of the spaces can supply one of the catapults by cross connecting lines to the desired holding tank.
