High Quality Content by WIKIPEDIA articles! The Baltimore Steam Packet Company, which was also known as the Old Bay Line, was an American steamship line from 1840 to 1962, providing overnight steamboat service on the Chesapeake Bay, primarily between Baltimore, Maryland, and Norfolk, Virginia. Called a "packet" for the mail packets carried on government mail contracts, the term in the 19th century came to mean a steamer line operating on a regular, fixed daily schedule between two or more cities. By the time the venerable packet line ceased operation in 1962 after 122 years of existence, it was the last surviving overnight steamship passenger service in the United States.