[TorpX]

I think that description is poorly phrased. IMO, the "sonar room" referred to in the film, is for sound equipment and not the sonar station we usually think of. Like the battery rooms or the pump room, they would not be manned, and would be too short to stand up in. I think the sonar station would have to be in the conning tower, or the control room at the very least.

Of course, the boat pictured is a post-WWII design, and I could be all wet, but this is my guess.


Edit:

Rendered null and void by Steelheads answer.