I can't speak to the ferry situation. I am not educated on it per se.
There are many types of policy frameworks and mechanisms that are used. You would be familiar with the industrial and technological benefits policy in Canada. Basically, for every dollar spent on a federal procurement of a certain level, it mandates that a dollar is spent here in Canada, which I think is, to some extent, a very passive policy.
Other countries, as I said, have an industrial policy or, ingrained within them, the notion that they will purchase and maintain their national security through their defence economics. In the United States, for example, you will never see a fighter plane that does not come out of Lockheed or Boeing, simply because it is deeply ingrained within the Americans that they will look to home first.
Those are some examples of what you can do from a policy framework perspective.