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Trapped Antarctic passengers 'not worried for our safety'

30 December 2013 Last updated at 02:45 GMT

Bad weather is still hampering efforts to reach a scientific mission ship trapped in dense pack ice in the Antarctic.

An Australian vessel has arrived in a renewed bid to free the Russian Academician Shokalskiy, which has been stranded since Tuesday.

Andrew Luck-Baker from the BBC's Science Unit is on board the vessel and says they know there are plans in place to rescue them.

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