The Arthur Anderson has been on service on the Great Lakes since 1952. She was the last ship in communication with the Edmund Fitzgerald when it sank in 1975. On Saturday she headed into Duluth Canal early in the morning. As you will see from the video, sea smoke was abundant that morning. Sea smoke occurs when you have cool air above a warmer liquid causing condensation to appear. The effect is quite dramatic when you see it on the Great Lakes or on any body water. That means the air is colder than the water causing this effect.