Detecting that would require the ability to detect ships, and that's what the RADARSAT Constellation will be able to do. RADARSAT-2 already can do it; the problem is that it's not a Constellation, and in order to have persistent surveillance, you need.... I know the Constellation plan is for three satellites, but it might be that they need four or five for persistent surveillance of the Arctic region. As I mentioned, unmanned aerial vehicles would also be able to conduct the surveillance of the region.
That's the detection component of it. I believe we also have underwater sensors at some locations in the north.
In terms of responding to it, the Arctic offshore patrol vessel will be an important asset to have, but only in the summer months. Of course, it can only go through one-metre-thick ice. It's very important that our Polar-class icebreaker be built, the new one that's supposed to be built in Vancouver.