The ice breaker John A. MacDonald throws its weight around to rescue winter-bound freighters in the St. Lawrence River and Gulf. If you look real close you can see a tiny figure scurrying across the floes -- that's the spirit of spring. St. Lawrence River An ice breaker is in the St. Lawrence to break up the ice for shipping. MS - Front of the boat looking right at the camera. MS - Looking over the side of the John A McDonald breaking up the ice. MS - Three boats stuck in the ice. Aerial shot - The John A. MacDonald opened up a section of the ice, now the boats that were stuck can get out.