does that just complicate the situation in terms of trying to triangulate how far debris could have potentially moved from any impact site? >> yeah, of course. i mean, it's not as though the currents have the same velocity or the same direction or the winds have the same velocity and same direction. it's all variable. these are swirling winds, might be eddies in the currents. it's a real complicated issue. welcome to the world of oceanography. as captain marks said, this is the world that we live in. but to find something, to backtrack something over so many days, it's going to be really tough. not impossible but really really tough. >> and i just want to reiterate to our viewers, the video you're seeing while david is talking here this is from 2012. this is not involved in this search. but it is in this area. and the reason we're showing it to you is to give you a sense of what it can be like out there on the water. you remember the first day -- here's more video which you see actually a person. this is from last year from a race that took place in that