Abstract: A scanning carriage, useful to perform simultaneous or concurrent subsea Time of Flight Diffraction (ToFD) and Phased Array Ultrasonic Testing (PAUT) of a subsea structure, comprises a housing machined to provide an incident angle for producing a predetermined set of desired refraction angles to help provide volumetric coverage of a weld in a one pass inspection; a Time of Flight Diffraction (ToFD) tool disposed proximate the housing and comprising a ToFD probe; a phased array ultrasonic testing tool, disposed proximate the ToFD tool, comprising a phased array ultrasonic probe and configured to produce multiple refracted angles with one probe placement; and a data communication link configured to interface with a data collection tool and operatively connected to the ToFD tool and the phased array ultrasonic testing tool.