The Russian ship was stuck since Christmas Day, in a shaft of ice about 1,500 nautical miles south of Hobart, Australia.
According to BBC: Another boat, the Aurora Australis, was on its way to the Russian vessel and expected to arrive on Sunday.
Expedition spokesman Alvin Stone told the Associated Press:
“I think we’re probably looking at another 24 hours of twiddling our fingers and waiting for something to happen.”
“We really are just hoping that the… two powerful icebreaker ships will provide the breakage of ice that we need.”
Correspondents say expedition members could be winched to safety by a helicopter if the weather remains favorable.