A continuous four-carrier American building cycle

What if the United States built four supercarriers every six years beginning with the Forrestal class?

It could maintain about twelve active carriers plus transition ships, with most hulls retiring after roughly eighteen to twenty-one years.

Congress would probably cap the practical fleet near twelve active carriers. The total might reach fourteen when ships in refit, commissioning, and retirement are counted. A four-ship order every six years would hold hull age to roughly eighteen to twenty-one years. The policy trades today's very long carrier service lives for predictable industrial throughput and regular replacement.