for help with sonars it's going to take week maybe even a month or more to respond to that to get mobilized oen edd on a ship and get the ship out there. even if it's a shorter distance than the malaysian air issue from land it will take a while to mobilize. the first thing you've got to know is where are you looking? where is that haystack? are you going to listen for pings? should you go out now with pinger locaters and go to the last position and try your luck? it's a very horrible situation that we find ourselves in once more that a plane's gone into the water without us knowing exactly where it is. i want to talk to david more about the challenges of underwater searchers. why not go out with pingers? we'll ask him that ahead. and the specialized equipment that it may take to find the wreckage. underwater vehicles can go where humans can, humans can't go