Replying to post #487. Ditching has already been discussed and dismissed due to several factors amongst them the weather, the dark and the sea conditions found on the open sea as opposed to somewhere like the Hudson.
I've never sailed across the South Atlantic, only the North and the swells can be awesome, enough to toss a 70,000grt vessel, designed for those conditions, about so I don't see an airframe standing a chance. I do stand to be corrected though.