[Jimbuna]

Originally Posted by Skybird

I just realised I have no clue on how long a Diesel boat of this kind can stay submerged without the crew running out of oxygene if Diesels are not running...? This is no 212.

In a "worst-case scenario," the missing sub could run out of oxygen in two days, Argentine navy spokesman Enrique Balbi said Monday.
Under normal circumstances, the vessel has sufficient fuel, water, oil and oxygen to operate for 90 days without external help, said Balbi, and the vessel could "snorkel" -- or raise a tube to the surface -- "to charge batteries and draw fresh air for the crew."
If the sub is bobbing adrift on the surface and the hatch is open, it will have an available air supply and enough food for about 30 days, he said.
But if it is submerged and cannot raise a snorkel, its oxygen may last only about seven days. When the sub last made contact on Wednesday, five days ago, it was submerged, Balbi said.

http://edition.cnn.com/2017/11/20/am...now/index.html