If you SuperMegaHappyForumSearch on MEC, you'll see some great input from a variety of sources, all trumped by the fact that the MEC as a vessel is entirely fictional. Well, not entirely, as ships DO exist, but you get the point.

Let it be whatever you want it to be. Let it be a renamed QEII, a leaky rowboat, heck, let it be an Invisible Pink Unicorn (tm)... just enjoy the tune.

M