I like it! It reminds me of a cross between Red Storm Rising and Echelon! I have designed addons for Orbiter Space Flight Simulator, and I can appreciate the work needed! Orbiter is another excellent platform for saying "What if"? I can see some of the ships I did being used like modern subs. Another author did a version of Capt Nemo's Nautilus for Orbiter.
Thanks!
Christopher Tarana