A Russian fishing boat that was stuck for 12 days while in danger of sinking in the frigid waters off Antarctica began a trek through 100 miles of sea ice to open water on Wednesday, New Zealand officials said.

The Sparta hit underwater ice Dec. 16 that tore a 1-foot hole in its hull. Heavy ice in the Ross Sea prevented help from reaching the stricken vessel for 10 days, forcing the Sparta’s crew to pump out near-frozen sea water to keep the ship afloat while awaiting rescue.

Now the damaged vessel is being escorted through the ice and toward the open ocean.

Click here for the full report.