underwater autonomous vehicle. so they're going to continue to search for vehicles until they're absolutely certain that the battery has run out. only then will they deploy the vehicle to go underneath the water and try and find the wreckage. and get some sort of confirmation that this is in fact from missing flight mh-370. but certainly encouraging signs out of perth this morning, errol. >> now, as you were speaking there, erin, we saw one of the maps which basically breaks down what the jacc announced moments ago showing the location of the four pings that have been detected plus what they call the estimated route of the last handshake. i think we can pull that up for our viewers now. even though angus houston said look, we're going to wait for another detection before we drop the vehicle. he still wants to wait longer because there could possibly be life in the batteries and that would narrow the search even