Members of deck force aboard the Coast Guard Cutter Polar Star rig a towing hawser while opening a channel through the ice to the National Science Foundation's McMurdo Station, Antarctica, for the supply ship Ocean Giant, Jan. 26, 2015. Towing equipment is used if the supply ship suffers a casualty while transiting through the ice. (U.S. Coast Guard photo by Petty Officer 1st Class George Degener)