Perhaps I can start.
Submarines are an incredible force-multiplying capability in any navy, for any country. One submarine equals 30 submarines as far as the adversary is concerned. The inability to detect the presence of a submarine in your oceanic areas of interest, and the amount of resources that must be diverted to tend to that submarine...because the weapons system is so lethal when it comes from a submarine.
In this regard, Canada has one of the most modern submarines in the world, at the top tier of submarining in the global naval powers. Some of the most inspired and experienced crew is with a bow sonar system upgrade of the Virginia class submarine and the Mark 48 weapons system, which is the most lethal submarine weapons system on the planet. The uncertainty of where the vessel is, what the nature of its mission is, its ability to remain stealthily deployed—these all demand many resources from an adversary to detect, localize, and track, and all the while the submarine is going about its very specific mission.
Thank you.