S-18 prop shaft issue

[Stealhead]

According to that old TM it seems that they could run the A/C while submerged unless under attack of course Im sure they'd run it only some of the time any time they are trying to conserve batteries.Also it they can have only turned on the fans and not the compressors for ventilation.

Form what I can see I doubt that the air temp would have been what we would consider cozy but it would have been bearable at least and you are getting some air movement as well so from a working comfort point of view it seems that it would have done its job If you where in a sub around Japan or that part of the Pacific it would have been better down south I doubt it would have been as comfortable but again better than nothing.

It states as well that the goal was for operational comfort and to remove humidity and cycle the air which makes it better than truly stale air.

Also here is the propulsion TM:http://www.hnsa.org/doc/fleetsub/diesel/index.htm