The Nimitz-class nuclear-powered aircraft carriers, aka “supercarriers,” are arguably the most successful “flattops” of the post-World War II era, fittingly named for a WWII hero and one of the most beloved U.S. Navy flag officers of any era, Admiral Chester William Nimitz. However, as the one saying goes, “All good things must come to an end,” and the Nimitz-class ships are being slowly but surely slated for retirement, to be replaced by the Ge…