lot, david. they're towing the underwater pinger locator to comb the area. that's a huge advantage now. again shallower water. and this more focused search area. >> if you remember the underwater locator beacon that we talked about on mh370, because the water was much deeper we had to go with the side-scan sonar, it had to be drug way down in the bottom of the ocean. meaning there's a long cable, as long as five miles hanging behind that ship. in this case, we're only talking less than a mile. what that helps is when they do the search pattern going back and forth. don't have to wait to get all the way out and back. this is going to be a much speedier search we're going to find this thing much quicker. >> and the pings, time is of the essence. we're not panicking yet because the battery life about 30 days we're about a week in. just shy of a week. >> yes, and the difference here is we knew where the aircraft was to start with. close to where the aircraft was to start. so that helped the search quite a bit. >> mary, one of the biggest concerns and troubles right now is the fact that the weather is