2. GMAW Unit Topics. During this overview, we will discuss the following topics:SafetyGMAW Basics Equipment Set-UpWelding VariablesProcess Advantages and Limitations AWS ConnectionNational Academic Standards Connection. 3. Unit Objectives. Upon successful completion of the GMAW Unit of Study, you will have learned about: Properly protecting yourself and others while weldingSetting up and operating GMAW equipmentStriking and maintaining an arcWelding in four positions using various electrodesWeld Inspection.