My 29th scenario of 2013...
This Cold War scenario assumes the Soviets have stealthily moved a couple of submarines into Hudson Bay. Canada considers this intolerable and acts to remove this threat.
I think this one turned out quite well. It might work well as a scenario for people getting used to Harpoon ANW because it is a straightforward search-and-destroy mission and you only have a few ships and aircraft to control. The only drawback, and this is often the case with an ASW scenario, is that there can be a lot of waiting while you search. There is at least one twist, however, that might show up and surprise you.
Image: Canadian frigate HMCS Nipigon (DDH 266); Source: Defense Visual Information Center - U.S. Department of Defense (DOD); Author: PH3 J. Elliott, USN