Overlay of radio continuum and water maser positions and velocities. Each panel refers to the POETS target indicated in the observed field above the corresponding plot. In each panel, black contours, and colored dots and arrows have the same meaning as in the upper panel of Fig. 1. Upper panel: the V_LSR gradient traced by the water masers is indicated by a dashed line, using colors to denote the red- and blue-shifted side of the gradient. The black dotted arrows labeled LJ denote the axis of the jet in H₂ 2.2 μm emission discovered in our recent LBT survey (Massi et al., in prep.). Lower panels: large view (left) and zoom on the water masers near the YSO (right) for the source G075.78+0.34. In the right panel, the V_LSR gradient traced by the water masers is indicated by a dashed line, using colors to denote the red- and blue-shifted side of the gradient.