Smoking? in an era when everyone smoked?
Yes- but only during times it was safe to do so- the "Smoking Lamp is Lit/Off" order. (you get a cookie when you can find the reason for the "lamp" refference)
Submerged, no- (obviously) and not while charging batteries, belowdecks- hydrogen gas is a byproduct of charging. On deck- at the OOD's discretion, and never in a combat area, unless deemed safe to do so. Probably more from the real vets, but you get the idea.
Oh and canned food? You bet- by the ton. Heard of C-rations? the " c" means canned ! The fresh/frozen storage wasn't all that big.
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