On-sky distribution of H I detections in Galactic co-ordinates; the symbols are colour-coded as a function of radial velocity (see labels at the top). Top panel: original 170 EZOA catalogue galaxies (circles depict those re-observed with the NRT); NRT non-detections are encircled in red, the newly found NRT detections in green. Bottom panel: EZOA sources based on the updated list (crosses), combined with galaxies listed in HyperLEDA (dots). For a better assessment of the large-scale structures, we have increased the range in Galactic latitude.