Shipping has started in the Great Lakes, but not on Georgian Bay.  I saw the Bae Comeau in Midland when I was there on the snowmobile earlier this winter.  This web site tracks all the ships in the world.  Click on the ship and get more information.  Zoom in or out with the scroll wheel.  Screen shot taken Mar.29/19

https://www.marinetraffic.com/en/ais/home/centerx:-82.7/centery:45.5/zoom:6