My wife and I go to Vegas every once in a while. Cigarette smoking in the hotels and casinos is allowed, and very noticeable. The smell of stale cigarette smoke seems to be everywhere, including our hair and clothes after a while - just plain nauseating. I can only imagine how bad it must be in a submarine.
I roll right past Las Vegas for that very reason. I have no interest in gambling, so why voluntarily enter the smelly premises?
The only time I've spent on a sub was for the purpose of repairing a Motorola SatNav on a research boat. It was a diesel boat. The smell of diesel was in my hair and clothes following the visit. I did get an invite for lunch. The quality of the food certainly matches the claims. Very good! I got a quick tour as well. The stainless steel peanut butter pump was installed to move the sewage around. Cooling was provided by using Peltier devices bonded with the hot side against the hull. An air plenum was routed over the cold side. The guy conducting the tour said that freon coolants aren't permitted on subs because the freon turns into phosgene gas (neurotoxin) in a fire.
On the way back to the shop, my radiator hose blew. It was a memorable morning.
It’s masked by the amine, diesel fuel and body odor smells. There’s a saying onboard a submarine: fresh air stinks.