Maximum coverage is obtained using a com bination of techniques including floor scanning by means of using MFL or SLOFEC floor scanner technique(s), as described in section 3.1, plus mechanical pit gauge meters, hand scan and C-Scan U/T, followed by detailed use of an ultrasonic probe to closeky examine material loss where identified. "Dead zones" where it is impracticable to scan with the floor scanners shell be subject to a combination of thchniques to achieve maximum practical coverage especially in areas of identified concern.