An article on The Navy League talks at length about it.
The island, or superstructure, of the Navy's new CVN 21 aircraft carrier is at the heart of numerous improvements planned for the ship. The new carrier, scheduled for launch in 2014, is to have an improved aircraft sortie rate, a crew that is far smaller than that of the Nimitz-class vessels, and lower life-cycle costs.
The means to achieve those goals began with a smaller, redesigned island that is made partly of composites and moved aft, or further back, on the deck relative to islands of the 10 Nimitz-class carriers. Rear Adm. Dennis M. Dwyer, program executive officer for aircraft carriers, said the redesign of CVN 21's island is "the real transformational part of the 'airport'" operations on board the carrier.
Slimming down the island and moving it about 100 feet aft created space on deck for the creation of a centralized re-arming and re-fueling location the Navy has dubbed the "pit stop," after the similar process in auto racing. It enables the crew to service the aircraft and get them quickly back into the air for another tactical mission. "That is the concept," said Dwyer. At present, "we do a lot of ... pushing planes around the deck and that takes a lot of time. They don't push cars in a NASCAR race. They drive them into the pit and they get out in 14 seconds. We [could be] doing that."
You can read the entire article: HERE
Glad I’m not driving then.