MH370 search boat 'lost'
Officials hold grave concerns for a vessel thought to be off the Antarctic coast that issued a distress signal on Friday.
Foreign Affairs Minister Murray McCully said he had asked for more information on the vessel, but did not want to speculate further, except to say "it doesn't look good".
Media have reported the Australian Maritime Safety Authority picked up the distress signal, but their rescue coordination centre has been unable to establish contact with the vessel.
It was reported both a civil Australian aircraft and an Australian Air Force Orion had flown to the area on Saturday.
The vessel was believed to be searching for debris of MH370 in the Southern Indian Ocean, after more potential leads were spotted by satellite images.
Weather forecasts for the area are poor.