A computer apparatus comprising: a camera ; a calibrated Head Up Display system having identifiable boresight features; and at least one processor in data communication with the camera and a memory storing processor executable code for configuring the at least one processor to: capture one or more boresight images, the boresight images comprising images captured by the calibrated Head Up Display system; capture one or more images from the camera overlapping the one or more boresight images; identify common features within the one or more images and one or more boresight images; compare the common features; identify boresight features in the one or more boresight images by identifying three points within the boresight to determine the orientation of a vehicle determine one or more transformations to apply to the one or more images based on comparison of common features, one or more transformations comprising establishing a vector relationship between the common features and the boresight features; and store the transformations for later application to future images from the camera wherein the calibrated Head Up Display system has been boresighted to the vehicle and provides a collimated display of the boresight. a camera ; a calibrated Head Up Display system having identifiable boresight features; and at least one processor in data communication with the camera and a memory storing processor executable code for configuring the at least one processor to: capture one or more boresight images, the boresight images comprising images captured by the calibrated Head Up Display system; capture one or more images from the camera overlapping the one or more boresight images; identify common features within the one or more images and one or more boresight images; compare the common features; identify boresight features in the one or more boresight images by identifying three points within the boresight to determine the orientation of a vehicle determine one or more transformations to apply to the one or more images based on comparison of common features, one or more transformations comprising establishing a vector relationship between the common features and the boresight features; and store the transformations for later application to future images from the camera wherein the calibrated Head Up Display system has been boresighted to the vehicle and provides a collimated display of the boresight. capture one or more boresight images, the boresight images comprising images captured by the calibrated Head Up Display system; capture one or more images from the camera overlapping the one or more boresight images; identify common features within the one or more images and one or more boresight images; compare the common features; identify boresight features in the one or more boresight images by identifying three points within the boresight to determine the orientation of a vehicle determine one or more transformations to apply to the one or more images based on comparison of common features, one or more transformations comprising establishing a vector relationship between the common features and the boresight features; and store the transformations for later application to future images from the camera wherein the calibrated Head Up Display system has been boresighted to the vehicle and provides a collimated display of the boresight. <EOS>