Yes. Only Quinten to Murg, Unterterzen to Au (Quinten) and Au (Quinten) to Quinten sail all year; the other lines are seasonal. Weesen to Betlis, Mols to Walenstadt, Mühlehorn to Quinten, Quinten to Au (Quinten), Au (Quinten) to Unterterzen, Unterterzen to Mols and Betlis to Mühlehorn run late March to late October.