Safe operation and proper field application of bulldozers and track loaders. Covers project engineering, including use of GPS (Global Positioning System) for grade control on a bulldozer. Applications include correct operating techniques and preventative maintenance techniques of assigned machine.  3 Credits (0 Lecture - 9 Lab) Prerequisite(s): HEO120 and HEO131 and HEO161 and HEO181 and HEO202. Corequisite(s): HEO220 and HEO231.