Right now we're looking at a single platform. Some ships may get an upgrade in certain areas, and that's certainly doable. That's really up to the Canadian navy.
I will tell you that in just about every combatant program in the world, surface ships, submarines, or whatever are built today with what we call “open architecture”, so that as the threat emerges, you're making software changes. Very rarely are you changing major hardware, such as launchers, torpedo tubes, and things like that, or even changing out radar arrays wholesale. It's really more in the signal processing to follow the threats through life. I would expect these ships to be what I would call “spiral upgradable” as threats progress over time.