Self-Propelled (locomotive) : A locomotive that requires no external source of electric power of its operation, e.g., diesel-electric, gas-electric, storage-battery-electric, turbine-electric
Ilan Kelman (ed.), Vulnerability and Resilience Definitions and References, Version 2, 2007. http://www.islandvulnerability.org/docs/vulnres.pd f, (Vulnr and Resilience - Brit) {524}