USS "Comfort" (AH-3) was a hospital ship for the United States Navy in World War I. She was the sister ship of but the two ships were not of a ship class. "Comfort" was known as SS "Havana" in passenger service for the Ward Line, and as USAT "Havana" in United States Army service before her Navy service. Her name was restored to "Havana" in 1927, and she was renamed SS "Yucatán" in 1935, and SS "Agwileon" in 1941. In World War II, she was known as USAT "Agwileon" and USAHS "Shamrock" in service for the United States Army.