>> the task force and the strain defense assets involved in the search for mh 370. on my right, we have the constable from the maritime safety authority. we have bob armstrong from atsb, the australian transportation safety bureau. i would like to update you on the latest developments rega regarding search for mh 370. as you're aware, there have been no confirmed signal detections since last tuesday night perth time. today is day 38 of the search. the guaranteed shelf life of the batteries on the aircraft black boxes is 30 days.