the windows are pointless, though. if you’re going 5k mph and a window is 1 mile long, you pass it in 1/5000th of an hour. an hour is 60 sec times 60 min, or 3600 seconds. a mile-long window passes in less than a second (and those windows are less than a mile long!) and what exactly can you see underwater anyway? even in a glacial kettle pond you only see a hundred feet or so. just let people have monitors and they can stare at the view from any external camera they want.