Typical observed (dots) and best-fit synthetic LTE profiles of the Na I 615.4225 and 616.0747 nm lines (solid red lines) in the UVES spectra of two RGB stars in 47 Tuc: Na-poor (5968, 1P, top row) and Na-rich (27678, 2P, bottom row). The identification numbers of each star, their atmospheric parameters, and the determined Na abundances are provided in the leftmost panels of each row.