Ultrasonic Phased array testing (PAUT) is an advanced non-destructive examination technique that utilises a set of ultrasonic (UT) probes made up of numerous small elements, each of which is pulsed /phased individually with computer calculated timing . These techniques can be used to inspect more complex geometries that are difficult and much slower to inspect with  single probes. PAUT can be used to inspect almost any material where traditional UT methods have been utilized, and is often used for weld inspections and crack detection.