VICTORIA STRAIT, Northwest Passage — When the CCGS Amundsen breaks through a 10-foot (or thicker) piece of ice, it rides on top of it first, the whole front of the ship sliding onto the sheet as the boat comes to a stop. Then the ship, 100 yards long and weighing 6,000 tons, crushes down, and its sharp hull splits the ice and pushes the fragments to either side.

Source: arcticnow.com

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