[quote=Loaf][quote=WilhelmSchulz.
Anybody know how the conning tower was actually manned in an attack?[/quote]
Well, at the very least you'd have two crewmembers manning the radar, the one at the TDC, and one at the plotting table. Plus you'd have the skipper, the helmsman, and XO in there too. While running submerged you'd also have someone at the hydrophone station.
This site gives a good overview:
http://www.maritime.org/tour/tctvr.htm