Dynamic spectra of the sodium doublet (top row), potassium doublet (middle row), C₂(0,0, bottom left), and Hα (bottom right) of V Hya as a function of the orbital phase. In each panel, the observed phases are shown twice to guide the eyes, time runs down. The colour represents the pseudo-continuum-normalised fluxes taken as the median value of the spectral window. The black curve represents the primary motion while the vertical line marks the systemic velocity, and the horizontal lines on the left indicate the observed phases.