Top left: colour-magnitude diagram of 47 Tuc. The stars with Gaia EDR3 photometry are represented as grey dots. The stars with a Gaia DR3 radial velocity are colour-coded by the formal uncertainties in radial velocity. Top right: distribution in equatorial coordinates (α, δ) of the 47 Tuc stars. Stars with a Gaia DR3 radial velocity are colour-coded by number of transits. Middle left: same as in the top right panel, with the stars colour-coded by G magnitude. Middle right: same as in the top right panel, with the stars colour-coded by the formal uncertainty in radial velocity. Bottom left: comparison of the formal and external precisions (see text) as a function of G magnitude for a sub-sample of 47 Tuc stars. The 68.3% confidence interval on the estimates of the precisions are represented as shaded areas. Bottom right: same as in the top right panel, with the stars colour-coded by combined radial velocity.