when is it expected to return to the search? >> usually we take a day or two for the planned maintenance. it's a regular thing. we watch the fatigue level of both the air crew and the plane very carefully. so you can't run people 24 hours a day. you also can't run equipment 24 hours a day. but we're in rotation with the australian forces. it's a very coordinated effort. so the search is covered for that day. >> australian officials are also saying that their search is now more focused on visual sightings as opposed to radar. i assume they're still using radar especially when something like the p 8 poseidon is part of the search. can you explain the idea behind really focusing on visual search as opposed to radar? >> sure. and really that came about because two days ago the weather was really bad. very low ceilings, a lot of fog.