>> that's right. because everything, all of your orientation changes. >> positively. sliding around, furniture, people are panicking. just absolutely positively horrific. >> the first good piece of nfgsz is they do seem to mostly have life jackets on. how big a difference will that make? >> sure, that will help you in the water but in really cold t water it will keep you afloat but not necessarily keep you alive. i hate seeing something like this. it's horrible. >> we believe in lapsed time we're trying to figure out how long it took to go from this position and where we believe it is right now, which is really just the underside of the bow is the only thing visible anymore. how long have you stay in water like that, 40 degrees, quick-moving current. >> quick-moving current, 40 degrees, adrenaline quicks in. i don't know the numbers. it's not awfully long. so it's certainly not hours. that's for sure. >> now, the task in a situation like this as we learned with the coast of concordia that the italian cruise ship there is to be able to get underneath.