>>23786131Okay, after booting up Mass Effect and taking a quick run around the original Normandy, I can see the ship was a bit wider than I'd pictured. Engineering doesn't seem quite as tall as you say (from the outside, the top hull seems to curve back, going downward from the rear edge of the comm room), but otherwise I'm willing to revise my estimates. But still, compared to the floorplans I'm looking at in my copy of Mongoose Traveller, the Normandy still clocks in around 400-600 tons.
When all is said and done, since we can't just get out measuring tape, we can argue this into infinity. From what I can tell, the Normandy almost counts as a Corsair from the main book while the Kolwoon-class Freighter (the other benchmark I was going for, the kind of freighter missions like the one with Biotic Terrorists or Dr. Saleon was on) is something like a Heavy Freighter.