Joint Coordination Center ( JACC ) said , robots Bluefin - 21 is derived from the Navy ship Ocean Shield . The focus of the search was still in the south Indian Ocean .
" The data collected in the search for six hours , are currently being analyzed . Took two hours for the Bluefin - 21 touch the bottom of the sea , " JACC statement , as quoted by ABC Australia , Tuesday ( 15/04/2014 ) .
Bluefin - 21 is scheduled to be lowered back today . While 11 aircraft and 11 ships will join in and do a visual search to find the signs of the MH370 .
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Monday, April 14, 2014 , Chairman of the JACC Angus Houston said , there was no detectable acoustic MH370 from the black box . This makes the search team to quickly deploy the Bluefin - 21 .
" We have not detected an sinyalpun in the last six days . So it 's time to do a search under the sea , " said Houston .
The deployment of the submarine robot is passed after search teams gave up to detect the black box . The black box was reinforced by batteries that emit a signal . But it seems the battery from the black box that was up last week .
Boeing 777 - 200ER belonging to Malaysia Airlines MH370 was reported missing on March 8, 2014 last . When missing , the plane carrying 239 passengers .