I think that even if there is sometimes tension with the Americans, we get along enough to say that we don't agree on all aspects of this issue. We can count on our allies to make sure that the shipping lanes are open to cargo boats.
We also have to remember that Canada is a member of NORAD, the bi‑national command. We have access to information that allows us to know who is navigating in our marine zones.
I guess the most important thing to know is what we would do if a rival country or another actor wanted to access these zones and we didn't want them to. That scenario is probably more intriguing than a possible dispute between Canada and the United States.