That is really cool (although kind of nuts to float it around somewhere as high-publicized–and high-security–as the Queen Mary). Wonder if they’ll get more complete photos of the sub up when they’re released?
I think that building a working replica of the Turtle is, as most others have said, really, really cool.
Taking it out into shipping lanes, esp. shipping lanes near a ship as world famous as the QMII is really, really stupid. There’s a quote in this article that claims to be from his website, which makes me think he meant to create a stir - it not quite as big a stir as he got.