OK; in response to the two questions
1) currently the only real 'movement' you'll see in the submarine will be with the Mighty Fine Crew mod where they make slight teleportations to and from the conning tower to inside the sub when you call to submerge. Nothing like the intro version though
Secondly; check out the links in the Silent Hunter forums on the TDC and there is one on Automatic. Basically you need to lock the target and then unlock it and you can use your scope as a crosshair
Cheers,
Krauter