What are the current abilities to recover something deep on the ocean floor?
It seems to me this plane was flown intentionally to one of the most hostile places in which a recovery could be attempted.
We've all seen the videos of Captain Sully landing on the flat water of the Hudson. Was there any floating debris after that landing?
I don't know if Astro14 is still bothering to follow this thread with all the recent quibbling and flashes of tin foil hat syndrome, but if so, as what size sea state could a plane the size of a 777 be water landed so that there is no major floating debris to find, especially if the passengers were already ...incapacitated?
I know the most recent search areas are prone to both sizeable long period swells and also shorter period storm conditions, and even both at the same time. I do not know what the sea state was at the time when the fuel would have run out, or nearly so, but I am sure this has already been considered.
But it seems to me that the plane might very well have been intentionally water landed, perhaps softly, with minimal debris, and sunk into one of the deeper ocean trenches available(~21,000 feet) the Diamantina Deep, in one of the most inhospitable areas in which to mount a recovery, with a Southern Hemisphere winter setting in. Look at how much the weather has already affected the search for floating debris, and I don't think a significant Cold front has pushed its way north past the search zone since.
The roaring 40's storms in the southern Pacific can easily send large groundswells to Alaska. The seastate in the center of such a storm can easily top 50 foot seas with hurricane force winds. In the Southern Indian ocean, Swells will easily make it as far north as possible, like Oman and Pakistan. The Indian Ocean being warmer seems to cause storms of greater magnitude as well when Antarctic cold mixes with the warmth from the North.
I think perhaps looking for a floating debris field is a waste of time. Perhaps dragging a sensor deep along the most inaccessible parts of the Diamantina Deep or Dordrecht basin would prove a wiser search method than looking for floating debris.
And if a muted ping is detected at 21000 feet deep, is recovery from such depths even possible?
At What pressures/depth can the Flight Data recorder actually survive to send out the ping?
Was there any other deep ocean trench options if the intention was to sink a plane in the deepest most inaccessible place possible? How much easier would a Challenger Deep recovery in the Mariana trench be in the tropics vs the roaring 40's.
The Java trench was closer and deeper than Diamantina Deep, but also too close to Indonesia's radar.