Operator 23 : The person present throughout the inspection or testing process who is responsible for the unit, operates the controls, observes the readout to detect imperfections, and classifies the pipe. (RP 5A5)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}