My tenth HUD-4 scenario of the year...
This is a straightforward Cold War submarine duel...it is 1983, in the early days of World War III, and a squadron of American submarines must find and destroy a squadron of Soviet ballistic missile submarines before they can escape into the Atlantic Ocean.
Image: United States Navy attack submarine USS Archerfish (SSN-678) (Source: http://www.navsource.org/archives/08/08678.htm; Author: U.S. Navy).