In regard to the 600 Ship Navy, understand that the mission has changed, the enemies have changed, and the technologies have changed.
While you still need a certain amount of iron-on-target, 100% control of the world’s sea lanes against a huge, worldwide naval adversary is no longer required.
100% control of the world’s sea lanes against a huge, worldwide naval adversary is no longer required....
At this time.
Ok, I’ll settle for 400.