Aircraft carriers aren't stealthy. They're certainly not invisible. A carrier transiting Gibraltar is witnessed by thousands. A carrier transiting Suez or Hormuz, again, witnessed by thousands from the shore and countless passing ships. The location of our carriers is a secret to no one.
My point is, who is announcing the deployments of these ships (not just the carriers), and why? You can read in the papers before they deploy, where they are going, when they're leaving, how long they'll be there, and their expected date of return !! Next, they'll be doing it with submarines !!
Or maybe it doesn't matter any more when your CIC is one of "them".