Underwater drone to investigate sonar contacts in MH370 hunt

A ship involved with the deep-sea sonar search for missing Malaysia Airlines Flight 370 is being fitted with a drone that will examine several sonar contacts of interest on the remote seabed west of Australia, officials said Wednesday. None of the sonar contacts exhibit the characteristics of a typical aircraft debris field, said the Australian Transport Safety Bureau, which is heading up the hunt for the Boeing 777 in a desolate stretch of the Indian Ocean. But some of the contacts do exhibit man-made properties and therefore must be investigated before they can be eliminated as having come from the plane, the agency said. More than 20 sonar contacts that crews have picked up in recent months require closer examination by a sonar-equipped underwater drone. <br/>