Can I add that ASW, anti-submarine warfare, is very much a team sport. First you have to know where to look, and that's where intelligence and maritime patrol aircraft, because they have the speed, are able to assist. They also have the weapon system, but they don't have the persistence. A frigate would have persistence, a submarine would have persistence, and it depends on what kind of weapon you intend to use. Surface ship frigates have speed. Submarines, again, don't, and the more speed a submarine uses, the more vulnerable it becomes and the more quickly it depletes its batteries, in the case of a diesel-electric submarine like Canada has, so it is a team sport.
