Optical spectra centred on the Lyα emission line and dropout of the newly discovered 4.53 ≤ z ≤ 6.13 radio quasars from the RACS sample. The sources are ordered in increasing redshift and the dashed vertical line in each plot indicates the expected wavelength emission of the Lyα1215 (and CIV1549) in the observed frame. The absorption feature observed at ∼7600 Å in several spectra is due to the O II in our atmosphere.