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The paper presents selected metrological techniques that may be applied in diagnostic endoscopy in complex machinery including turbine and piston marine engines. The evolution of contemporary endoscopes has been described as well as theoretical background for optical and digital endoscopy. The methods of surface defect measurements of selected elements of marine engine structure have been presented based on a digital recording of endoscopic images: Stereo Probe, Shadow Probe, laser method and RGB.

Measurement methods in marine engine endoscopy