Kind of a fun site, “Global Security”:http://www.globalsecurity.org/military/agency/navy/csg.htm answers the question, where are the carriers. Tells you an amazing amount of facts about where they are right “now”:http://www.globalsecurity.org/military/ops/where.htm which is basically that we have twelve carriers with the Nimitz in the Persian Gulf and the Vinson in the Pacific right now. There is one carries, the Roosevelt that is “surge ready” that it is it is ready to be deployed.
Amazing how it takes twelve carriers to have three up and ready to go. That’s because of training and maintenance cycles.