WASHINGTON - The United States is sending a heavy icebreaker to help free a Russian ship and a Chinese icebreaker gripped by Antarctic ice, the Coast Guard said on Saturday.
The Polar Star is responding to a request for assistance from Australian authorities as well as from the Russian and Chinese governments, it said in a statement.
"The U.S. Coast Guard stands ready to respond to Australia's request," Coast Guard Pacific Area Commander Vice Admiral Paul Zukunft said.
A Chinese icebreaker that helped rescue 52 passengers from a Russian ship stranded in Antarctic ice found itself stuck in heavy ice on Friday.
The Xue Long, or Snow Dragon, ferried the passengers from the stranded Russian ship to an Australian icebreaker late Thursday but now was unable to move through heavy ice, the Australian Maritime Safety Authority said.
The Russian-owned research ship left New Zealand on Nov. 28 to commemorate the 100th anniversary of an Antarctic journey led by Australian explorer Douglas Mawson.
It became trapped on Christmas Eve, 100 nautical miles east of French Antarctic station Dumont d'Urville and about 1,500 nautical miles south of Tasmania.
The Polar Star is 399 feet long with a maximum speed of 18 knots. It can continuously break 6 feet of ice at three knots, and can break 21 feet of ice backing and ramming, the Coast Guard said.
The cutter is cutting short its planned stop in Sydney to help with the mission.