Stacked RRL spectra toward the seven positions marked in Fig. 11. The identifying number is followed (in parentheses) by the factor by which these have been multiplied. The red lowest two spectra are extracted toward two intensity maxima, while the remaining black spectra are extracted from environmental positions of the Hii region. The dotted red and black lines mark the peak velocities of Gaussian fits to spectra 1 and 4, respectively.