Why scaling a Nimitz into a space carrier breaks its crew assumptions

Is a 60-kilometer Nimitz-style space carrier with a billion crew and fifty million fighters excessive?

Yes; the crew would be crowded, and a years-long space deployment requires far more support space while its fighters would also be much larger.

Wholesale scaling of a Nimitz-class carrier does not preserve sensible crew and aircraft ratios. A billion people inside the proposed 60-kilometer ship would create extreme crowding even before accounting for its fighter force. A space carrier operating for years needs much greater habitability, recreation, stores, and life-support capacity than a naval carrier built for deployments measured in months. Its fighters would also be larger systems than contemporary carrier aircraft. The panel therefore treats endurance and human support as the controlling scale questions rather than simple multiplication of today's complement.