The Fairweather, a 235-foot low-wake catamaran bound for Alaska, is berthed in Seattle on Tuesday. The vessel can carry 35 cars and 250 passengers at speeds up to 48 miles an hour. The ship is the first car-passenger ferry built in the United States to the international high-speed code and is the first of two the Derecktor shipyard in Bridgeport, Conn., is building for the state under a $68 million contract. The ferry left the yard March 3 and has traveled through the Panama Canal. It's due to arrive this weekend in Juneau, where it will serve runs to Sitka, Haines and Skagway.