"The Autonomous Underwater Vehicle, Bluefin-21, was forced to resurface this morning to rectify a technical issue," Australia's Joint Agency Coordination Centre (JACC) said.
"Bluefin-21 was then redeployed and it is currently continuing its underwater search."
Data was downloaded from the unmanned vehicle while on the deck of the Australian vessel Ocean Shield, which has led the search for the Malaysia Airlines Boeing 777 that vanished on March 8 with 239 people aboard.
"Initial analysis of the data downloaded this morning indicates no significant detections," JACC said.
AFP