My 23rd scenario of the year...
This scenario assumes that, in 1971, the United Kingdom tried to enforce an arms embargo on South Yemen, which it believed was creating instability in the region. The Soviet Union, an ally of South Yemen, refuses to recognize the embargo and has sent several merchants, some carrying weapons, to South Yemen; with them are several Soviet warships. Can the United Kingdom enforce the embargo, boarding and seizing those ships carrying contraband?
This scenario was an attempt to demonstrate the flexibility of the HUD-4. Officially, the HUD-4 covers approximately 1980 to 2015; however, many platforms in the HUD-4 were active earlier in history. As one can see, it is not difficult to create scenarios set in the early 1970s using the HUD-4. In fact, the HMS Lion, for which this scenario is named, and which is in the database (because the Tiger-class cruisers were not completely retired until the 1980s), does not even appear in the HUD-4's official time frame, having been decommissioned in 1972 (and then cannibalized for parts for her sister ships). It seemed only fair, however, to give her a chance to play Harpoon, too.
Image: British submarine HMS Ocelot (Source: U.S. DefenseImagery photo VIRIN: DN-ST-90-07973; Author: PH1(SW) J. Elliott, USN)