The Seaboard System was a short-lived class I railroad company in the Southeastern United States from the end of 1982 to mid-1986. Formerly known as the Family Line System after merging with the five companies in the Southeast, the railroad didn't last long until the company merged with the Chessie System to become CSX Transportation.

While the Seaboard System and their former predecessors are not featured in Train Sim World, many locomotives and Rolling Stocks were passed on to CSX Transportation, which is featured in CSX Heavy Haul and NEC: New York.

Fallen Flag Railroads
CSX Transportation Chessie System - Conrail - Seaboard System
Norfolk Southern Conrail