Bello, exactly how will the grab / skip system be deployed from the JL to test them? They won't, as it's a survey and ROV Support Vessel and it can't as it has no crane, massive A frame or drilling derrick.
Also, grabs do not necessarily make the difference either on deep high value wrecks, the Central America and the Republic prove this.
Finally, I am puzzled Bello, how you can read Deep Water and not take on board who actually recovered 1000t of copper from the FV. That is what the book is about, after all.