Visualisation of the spectroscopic orbits of our targets. The best-fitting orbits are shown with black lines. The RVs of the stars at the times of observation are shown with red symbols for the primary component and blue symbols for the secondary component. Note that these are not measured RVs, and hence the uncertainties in RVs are not assigned to individual symbols, because we calculated orbital parameters directly from all observed spectra for each system (see Sect. 4).