Effective February 20, the /F suffix for aircraft equipped with single FMSs has been revised to account for advanced Rnav equipment. Suffix F now includes four sub-equipment selections: a basic FMS meeting AC 25-15, AC 20-129 and AC 20-130A; system depicts and follows lateral and vertical paths; an FMS with DME/DME updating, as well as a single GPS and single IRU; and a database containing waypoints and speed/altitude procedures that is automatically loaded into the FMS flight plan.