Bill I'll ask you directly this question, you know how the Vengeance is "officially" about 1500 meters? I'll add the second part when you respond.
It really doesn't matter what I "know", because whether its 15 meters or 1,500, it doesn't affect my enjoyment of the movie.
This has to do with the size of the ship. Ok I'll be more specific, you know how the Star Destroyer is the same size right? Well if they are both the same size why is the Vengeance's bridge window big on the hull while the ISD's bridge window is tiny on the hull. Here are a couple of pictures for reference. I highlight the bridge area in green on the QMX model.
[ IMG]http://www.st-v-sw.net/images/Wars/Special/ISD/isdface2asm.jpg[/ IMG]
[ IMG]http://i44.tinypic.com/2a8gj28.jpg[/ IMG]
[ IMG]http://i44.tinypic.com/2ztbo9e.jpg[/ IMG]