I was just on the old carrier USS Hornet (CVS-12) the other day, and it's smaller than a Nimitz or the Enterprise, and post-war its crew complement was 3000–3500. I walked through some of the crew's berthing and some of those compartments had 48 bunks each, sometimes in racks three high. You could get a crew of over 400 just by having eight of those berths and a few more private compartments in officer's country.