SYDNEY - A torpedo-shaped mini-sub could provide conclusive proof that missing Malaysia Airlines Flight MH370 crashed into the Indian Ocean, but the task is set to push the machine to its limits.
The Bluefin-21, a 493 centimetre (16.2 feet) long sonar device is expected to be deployed to the ocean floor in the days ahead to look for debris from Boeing 777, which vanished on March 8.
Angus Houston, who heads the agency coordinating the eight-nation hunt, said that after more work to detect "pings" consistent with those issued from aircraft black boxes the autonomous submersible could be deployed in the remote area off western Australia where the search is focused.
Once in the water, if the device detects something unusual using the sonar, it can be brought to the surface and sent down again equipped with a video camera to provide the visual evidence of a crash.
"You can't have the side sonar and the camera down there together, it's one or the other," the retired Air Chief Marshal Houston told the ABC.
"We will continue sortie after sortie until such time as we pick up evidence that there's something unusual on the ocean floor. We would then send down the camera.
"What we're after is wreckage, a debris field as people would say." The device was designed for offshore surveying, search and salvage operations, archaeology and exploration, oceanography and mine countermeasures and its modest size makes it easy to transport.