The one thing that I think might be in its favour of it being genuine is the website that is hosting the picture (assuming they are the people who claim to have found it). They seem to be pretty serious divers with lots of experience of locating underwater wrecks. If it turns out to be a fake it would seem a pretty underhanded method of getting a bit extra publicity, especially if the other projects they are working on are real. Hmm, maybe I’m just in trusting mood today … still sceptical, but would love to be proven wrong.