We have quite good situational awareness in Canada's Arctic. This is often ignored by pundits. We have, for instance, the world's best synthetic aperture radar satellite, RADARSAT-2, that we designed for the Arctic. It can measure the thickness and density of sea ice. It even can reputedly detect the wake of submerged submarines, although I don't know that for sure because that would be classified information.
We're launching the successor, RADARSAT Constellation Mission in February, three satellites with even better technology. We have pretty good surveillance from space. That doesn't cover the underwater domain completely, and underwater sensors do make sense.
I don't think one should refrain from seeking situational awareness because of a concern that it might create a legal problem in the future. All I'm saying is that, up until now, if a Soviet or Russian or, indeed, an American submarine had gone through without us noticing, that's not a legal problem for Canada. That's a covert action. That is where I think we stand right now.