May be designated according to type of equipment used as Welder, Carbon Arc (welding); Welder, Flux-Cored Arc (welding); Welder, Gas-Metal Arc (welding); Welder, Gas-Tungsten Arc (welding); Welder, Hand, Submerged Arc (welding); Welder, Plasma Arc (welding); Welder, Shielded-Metal Arc (welding). Manually guides electrode or gun along weld line, maintaining length of arc and speed of movement to form specified depth of fusion and bead, as judged from color of metal, sound of weld, and size of molten puddle.