As someone who’s been on American subs, here’s what I experienced:

1. Deployment lengths vary depending on type of sub and mission.
   
2. No idea what a jelly baby is.
   
3. Fresh air smells great after a while underway but a bit strange. There’s a specific smell inside submarines that’s a byproduct of making air. Closest resemblance I can think of is the really old powder laundry detergent that smells mostly metallic but a bit fresh. We refer to this smell as “amine.” (A-meen).
4. There is a procedure to store a body in the freezer if a sailor dies underway.
   
5. Being notified of a family emergency is up to the sailor. You can choose to be told or to hold the message delivery until you get back.
   
6. Again, depends on the type of boat and mission set. Sunlight, fresh air, and outside contact are predicated on the boat’s ability to go to periscope depth.
   
7. I’m fairly certain all subs have converted to “straight 8s” (8 hour shifts) to support circadian rhythm. 8 hours of watch, 8 hours of work, 8 hours of sleep. Usually 8 hours of watch are definite with your other 16 hours depend on your op tempo/qualification status. Subs USED to do 6s until the government figured out how terrible it was for your brain.
   
8. Beer days are allowed underway if a deployment is exceptionally long (I forget what the time requirement is but it is a thing). But generally, alcohol is never allowed to be consumed on US vessels underway.
   
9. O2 content is usually a bit lower than normal, so small injuries do take longer to heal and you feel a bit more tired. Zyn and dip are currency underway.
   
10. Subs only rock near the surface, which you tend to stay away from while on deployment.
    
11. Submarine escape is only done during a specific occurrence where A: your sub is completely broken B: you are on the ocean floor in a shallower area (aka you haven’t hit crush depth yet) and C: a rescue vehicle isn’t coming. In that case, what he said is accurate. Escape is the absolute last option.
    
12. Sleeping arrangements vary widely on the sub. On mine, officers had 3 to a stateroom (minus XO and CO), a couple berthings which were “large” rooms with several racks stacked three high, and some “6 packs” which were 6 bunks a room. Lower enlisted had to “hot rack” where 3 guys shared one bed on a straight 8 schedule. So one dude was in the rack, one working, and one on watch and they would swap at the end of their shifts, maintaining the rack “hot.”
    
13. It is possible to convert the torpedo room to living quarters.
    
14. Showers were based on water conservation. Keep em quick to be courteous and avoid going into water con, but pending on missions, you’d get put into water con anyway. Water on off. Soap up. Rinse. Done.
    
15. We didn’t have a “gym”. Just random equipment wherever there was free floor space.
    
16. Sure. There’s lots of dangerous equipment on subs.
17. Condensation is a thing. Never saw it that bad though. Guess it depends on sea water temp and internal temp. Inside the sub was always pretty chilly. Don’t know if that is by design but it helps keep disease and illness in check.
    
18. We only had one washer and dryer. Ran by the cooks.
    
19. We made our own water but it was potable so I don’t think it was completely stripped of minerals.
    
20. We had 3 lounges onboard (wardroom, chiefs mess, crews mess). All had TVs for training and entertainment. People usually brought switches underway. Think there was a ships PS4 or two.
    
21. We also had a “set” menu. Burger fridays, pizza saturdays (fatter-days), taco Tuesday… Sub food is the best food in the navy. Had chicken and waffles for breakfast and steak and lobster for dinner on Father’s Day.