Sheffield was not equipped with Aegis. The only ships in the 1980s that had it were the American Ticonderoga-class guided missile cruisers. Aegis is the name

Sheffield was not equipped with Aegis. The only ships in the 1980s that had it were the American Ticonderoga-class guided missile cruisers. Aegis is the name of a specific anti-air system based around the SPY-1 phased-array radar and SM-2 surface-to-air missile. It is not a catch-all term like Kleenex.