Cmdr. Kenneth Boda, executive officer and ice pilot, Chief Petty Officer Jeffrey Sullivan, a boatswain's mate and officer of the deck, and Petty Officer 1st Class Allen Birt, a boatswain's mate and break-in officer of the deck, navigate the Coast Guard Cutter Polar Star through pack ice from the ship's aloft conning tower while underway in the Ross Sea near Antarctica, Jan. 8, 2015. Polar Star's crew is underway in support of Operation Deep Freeze 2015, as part of the U.S. Antarctic program, which is managed by the National Science Foundation. (U.S. Coast Guard photo by Petty Officer 1st Class George Degener)