National Geographic : 1956 Aug
170 U. s. Navy, Official + Smashing Through Ice Six Feet Thick, Glacier Batters Down Antarctica's Guard The 10-engined Glacier fulfills a motorist's dream for solving traffic jams: she backs off and charges headlong. Advancing a few yards, she shudders to a halt, retreats, and rams ahead again. In heaviest going, the ship's slanting bow slides up onto the ice, crushing it by the sheer weight of her 8,625 tons. Crewmen compare ice breaking to riding a runaway bus over a hummocked, corkscrew road. Here, forced off course by a stubborn stretch, Glacier plows a looping furrow up McMurdo Sound toward Hut Point. Thin-skinned cargo ships, moored far behind, could not come up the floe-choked channel. Icebreakers ferried supplies to waiting tractor trains. "The toughest ice operation in polar history," said Admiral Dufek. +- Water and ice explode beneath Edisto's bows as the 6,500-ton breaker slams forward.