This powered EMD F7 A unit locomotive is painted grey with Large “Seaboard System” letters and Chevron Stripes. The Seaboard System Railroad, Inc. (reporting mark SBD) was a short-lived former US Class I railroad that was created after the consolidation of the Family Lines System railroads. On July 1, 1986, the Seaboard System renamed itself as the CSX Transportation and absorbed the Chesapeake & Ohio® Railway on August 31, 1987 which ended the CSX Corporation’s shared ownership of the Seaboard System and Chessie System railroads.