Builds on the knowledge and skill acquired in Basic Arc and Gas (WELD180M). It provides the training to make multiple-pass fillet and square groove welds in all positions on mild steel plate using the (SMAW) process. Also provides training to develop the skills to make fillet and square groove welds in the flat, horizontal and vertical positions on mild steel, using the (OFW) process. Prerequisite: WELD180M.