[fastfed]

Originally Posted by VikingGrandad

Check this earlier post: https://www.subsim.com/radioroom/sho...78#post2946578

Hopefully that answers your question.

You can easily test how long the oxygen lasts if you use one of the Academy missions, submerge for a long time and see what happens.

Thank you cool information, although it seems unrealistic, unless all these books I've read are wrong I remember reading these guys could stay down there a lot longer then 5 or 6 hours without having to use o2 canisters