Top: mean flux-calibrated low-resolution spectra of HY Eri in the high states of 1993 and 1995. For comparison, the eclipse spectrum of 2000 (blue curve) and the mean out-of-eclipse spectrum in the 2008 low state (red curve) are added on the same ordinate scale. Bottom: mean radial velocities of the broad emission lines of Hβ and HeIIλ4686 (open circles) and of the line peaks (cyan dots) derived from medium-resolution spectra taken on 15 November 1995.