Depends. Are the aircraft counted?

In either case, the secret design has the same effect, but sub secrets are the top of the top of top secret. Spies that leak sub secrets, spend a long time in Leavenworth.

>> nuclear sub

>aircraft carrier

Having served on both, this is actually a pretty interesting comparison (at least to me).

Carriers are simply larger, so they likely win by scale, but im not sure on a more per-(sub)system basis.

Carriers have a lot of aircraft handling systems that subs dont, elevators and hangers. Also the carrier has group c&c stuff.

Subs have a lot of stealth systems carriers don't, being that they're visible from space. Lots of dive related stuff, o2/co2 handlers.

They both have weapons systems, hvac, propulsion, distillation, steam generators, reactors, air compressor, many others.

Not obvious to me which one is more complex!

Which did you enjoy serving on more? Submariners apparently eat better than anywhere else on the navy, but also don't get any sunlight for 6 months?

Wow, I could not imagine getting this response from someone with real experience! Thanks!!