RM images and properties of the H I tail and in a nearby region. Left: magnified RM image with VST Hα contours (yellow) and MeerKAT H I contours (blue). The black and magenta boxes indicate the H I tail and control regions considered in our analysis. Middle: distribution of the RM values in the H I tail (black) and in the control region (magenta). Right: RM structure functions evaluated in the H I tail (black) and in the control region (magenta).