Which type of presentation is commonly displayed by facsimile recordings rather than a CRT display?

• A. A scan presentation
• B. B scan presentation
• C. C scan presentation
• D. None of the above are adaptable for facsimile recordings

Answer: (C)

C-scan presents a plan view of the inspected area, showing where features occur across the surface in the x–y plane rather than depth. This planar map is especially well suited to hard-copy documentation, so facsimile recorders are commonly used to print it as a complete map of defect locations over the scanned area. In contrast, A-scan data (amplitude vs time) and B-scan data (cross-sectional depth view) are typically displayed in real time on a CRT or printed as waveforms, not as a static surface map. Therefore, the type most often captured by facsimile recordings is the C-scan presentation.