I don't understand. The ship right now is the tomb for those that died, and they rest at sea where they wanted to venture as fishermen (they were all male, right?). I don't see that raising the ship really does anything other than moving the bodies around.
I'm not insenstive to the families, and I suppose if they want it done to give them a proper burial, they should do it. At this point, attempting to place myself in their shoes, I'd be inclined to let the dead rest.
Such a tragic accident, and the probabilities of it happening are so amazingly low.
Just out of curiousity, why did a Japanese ship go to Hawaii to look at fish? Isn't that a little far to go, or was the trip along the lines of a "working/learning vacation"? I didn't read anything detailed about the ship's journey.