Great Lakes Winter Commerce Act of 202 1 This bill directs the U.S. Coast Guard to conduct icebreaking operations in the Great Lakes in accordance with specific performance standards. Specifically, the Coast Guard must keep channels and harbors in the Great Lakes open to navigation not less than 90% of the hours that commercial vessels and ferries attempt to transit ice-covered waterways; in a year in which the Great Lakes are not open to navigation because of ice of a thickness that occurs on average only once every 10 years, keep channels and harbors open to navigation at least 70% of the hours that commercial vessels and ferries attempt to transit ice-covered waterways; and coordinate Great Lakes icebreaking operations with operators of commercial vessels. The bill also directs the Coast Guard to acquire a Great Lakes icebreaker that is at least as capable as Coast Guard Cutter Mackinaw in an accelerated timeframe and award the contract on the basis of contractor qualification and price.