WINONA, Minn. – Winona firefighters in their rescue boat intercepted a pontoon pleasure craft free-floating down the Mississippi River. No one was aboard. This was about 9 a.m. The Fire Department rescue crew had been alerted by two callers that a pontoon boat was adrift in the main channel with no one aboard.. Firefighters eventually located the craft’s owner, who said that he had beached the craft overnight at Prairie Island while camping and that it had slipped away