Now, he is attempting to trek back to the Arctic in a new way. Dupre departed late Thursday afternoon from his home base of Grand Marais by sailboat on a 6,000-mile expedition to Greenland. He and his ...

Normally a boat sailing upwind will sail approximately 45° into it, then “tack” 90° across the wind until they’re at another 45° angle from the wind, this time facing the opposite direction.