An ultrasonic inspection device (2, 4, 6) for inspecting a structure comprising: a flexible assembly comprising a flexible ultrasonic transducer array having first and second faces, and a flexible delay line substrate acoustically coupled to said first face of said flexible ultrasonic transducer array; a data acquisition module configured to control pulsing of and data acquisition by said flexible ultrasonic transducer array; a global positioning system receiver configured to determine a location of said global positioning system receiver; a transceiver configured to communicate with said data acquisition module and said global positioning system receiver; a battery electrically coupled to said data acquisition module, said global positioning system receiver, and said transceiver for providing power thereto; and a calibration database server configured to store structural model data representing material properties of a structure as a function of location in a coordinate system of the structure, wherein said data acquisition module, said global positioning system receiver, said transceiver, and said battery are physically attached to said flexible assembly, wherein said transceiver is configured to: - receive location data from the global positioning system receiver and transmit said location data to the calibration database server; - receive calibration data from the calibration database server, the calibration data being a function of said stored structural model data representing material properties of the portion of the structure in proximity to the location of the flexible ultrasonic inspection device; and - forward said calibration data to the data acquisition module; and said data acquisition module is configured to auto-calibrate the flexible ultrasonic transducer array using said calibration data. a flexible assembly comprising a flexible ultrasonic transducer array having first and second faces, and a flexible delay line substrate acoustically coupled to said first face of said flexible ultrasonic transducer array; a data acquisition module configured to control pulsing of and data acquisition by said flexible ultrasonic transducer array; a global positioning system receiver configured to determine a location of said global positioning system receiver; a transceiver configured to communicate with said data acquisition module and said global positioning system receiver; a battery electrically coupled to said data acquisition module, said global positioning system receiver, and said transceiver for providing power thereto; and a calibration database server configured to store structural model data representing material properties of a structure as a function of location in a coordinate system of the structure, wherein said data acquisition module, said global positioning system receiver, said transceiver, and said battery are physically attached to said flexible assembly, wherein said transceiver is configured to: - receive location data from the global positioning system receiver and transmit said location data to the calibration database server; - receive calibration data from the calibration database server, the calibration data being a function of said stored structural model data representing material properties of the portion of the structure in proximity to the location of the flexible ultrasonic inspection device; and - forward said calibration data to the data acquisition module; and - receive location data from the global positioning system receiver and transmit said location data to the calibration database server; - receive calibration data from the calibration database server, the calibration data being a function of said stored structural model data representing material properties of the portion of the structure in proximity to the location of the flexible ultrasonic inspection device; and - forward said calibration data to the data acquisition module; and said data acquisition module is configured to auto-calibrate the flexible ultrasonic transducer array using said calibration data.