Is it possible for AIP subs to stay on the seabed doing nothing waiting for enemy subs or warships approaching the area and then strike them. In that case ... is 90 day possible?
For joke nah
Yet no for food... SSK the more small submarines have less room for the stock but also less numerous crew... especialy the last very automatized some get only around 30 sailors !
have for 30/60 days.
Curiously Nuclear US get more big crew than Russian more automated then normaly US get better technologies...
The more common Type 209 in general 50 days, Kilo 45, Ming 60 days except him no data for Chineses and in general not always easy to have.
Nuclear more big 60/120 days, the Typhoon the Leviathan 120 days with cozy room for smoke, little pool for relax and a cellar for French wine eventualy Vodka for that no
Russians Typhoon, Oscar II 120 days others 100 including Borey, Delta III/IV 80/90, Victor III definitely inferior.
Ohio, Triomphant 70, Suffren 70, Rubis 45/60.
But don' t forget 60 or more days in a " tin can " it is not funny...
After if the AIP SSK don' t move or almost during 90 days for air for crew possible in theory ? seems much.