The color scale presents in the left and right panels, the first and second moment maps (intensity weighted peak velocities and line widths) toward NGC 7538S. The molecular lines are marked in each panel. The contours show the 1.36 mm continuum in 4σ steps (1σ ~ 0.7 mJy beam^-1). The synthesized beam and a scale-bar are presented in each panel. The lines outline the axis used for the pv-cuts in Figs. 9 and 10.