Comparison of the astrometry in our new and the ERO official VIS catalogues. In each panel, we show the positional residuals as a function of position in the Gaia catalogue. The positional residuals are computed as the difference between the Gaia DR3 positions and our or the ERO positions transformed on to the reference frame of the Gaia catalogue. All units are VIS pixels. The labels on the right side of each plot describe the quantities depicted in each panel. The red, dashed horizontal line is set to 0 as a reference.