Hallo slam, ich muss dir eigentlich auf englisch antworten, aber wir haben auch ein deutsches Forum wenn du englisch nicht verstehst:
http://www.subsim.com/radioroom/forumdisplay.php?f=252
Regarding your question, yes I think there were some mods for the interior that made the observation periscope raise visually in the control room when you lift that scope. Divingduck (Also a german guy) solved it in his interior mod, and I think Lucagaeta's "Open the conning tower hatch" mod also did
