Robotic search vehicle & MH370 wreckage

MH370 has been missing for 31 days. The Australian Joint Agency Coordination Centre uses multinational ships,  aircrafts, submarine and robotic search vehicle to find the wreckage. At the depth of over 4500 metres in southern Indian Ocean, the robotic vehicle can roam. Australian and Chinese vessels detected signal believed to be from MH370 black box in the area.