I have found an incredible site that make remote controle submarine really accurate
working beneath water with light on ...The Nautilus has even the Iris glass working !
http://rc-sub.com/Projects.html
they make the Nautilus 1/32 scale
Us Los Angeles type 1/72
German Type VII 1/72 scale
US seawolf class 1/72 scale
Canadian Victoria Class 1/50
Russian Typhoon class 1/96
...if a competant modder is interested in making a 3d model of the Nautilus for the game , please contact me