Ozzy, I think kelson is talking about default carriers-
As for those, there is one in Pearl Harbor, near Honolulu, HI.(Honolulu Int'l, I think) Take off from the active runway there and on the left (If you're facing the city) there should be a bay/harbor. The ship is in there, but you can't land on it

Another one that
is landable is in Hawaii, too. Take off from PHOG and it is heading 200 (or maybe 220--i dont remember) It is right past the second island you pass over. You should be able to see it, cuz its got red lights on it...

Hope this helps
