“…The fleet maintains the Northern Sea Route, a 2,500-mile shipping corridor along the northern Soviet coastline. Canada holds second honors in terms of numbers of icebreaking vessels (24), and the United States follows with 5 icebreakers in service. However, the most recent additions to the U.S. fleetthe Polar Star and the Polar Sea-with 58,188 kw shaft power, are more powerful than Canada's largest vessels-Louis S. St. Laurent (17,896 kw shaft power), Pierre Radisson, Franklin, and des Groseilliers (10,145 kw), and the Sir John A. Macdonald (11,185 kw).…”