I'll give you one example.
Since Canada is far away from other parts of the world, when we send a frigate somewhere, we might need that frigate to be more or less self-sufficient for, say, six months at a time. That has implications for how you set up your ship, as compared, for instance, to French frigates, which are designed to operate independently for a much shorter period of time. These are considerations that will necessarily affect the design of a ship. You might think, for instance, about what radar system you might want to put on a ship, and to what extent you might then deploy that ship to support efforts for missile defence, for instance, by allied countries.
These are all particular considerations that have both military components and political components. That's why I say it is an instrument of foreign policy, and if we don't equip the ships with that in mind, that might mean we might have nice frigates that ultimately cannot perform the requirements that taxpayers and the government of the day might have in terms of deployment expectations.