Quoting A minute ago in the store across the road ...
awesome i never knew the imperials had under-water machines!!! cool and great work, but what does the TIE stand for!?!?!
tie usually stands for twin ion engines, but here it stands for twin ion evaporators, the devices which allow it to enter and leave water with minimal drag.(p.s, this isnt a real ship, I made it up:) )
Very cool! I love the wings, although they´re very similar to darth vaders tie advanced one´s! I guess this is your invention (isn´t it?), maybe I´d add some screws (I hope that´s the right word) or tubes, because it doesn´t really look like a submarine. Anyway very good job!