Velocity structure of the N₂H⁺ emission as determined from hyperfine fits to the spectra. For each region, the first panel shows (in km s^-1) the spatial distribution of the velocity centroid, and the second panel shows (also in km s^-1) the distribution of non-thermal linewidth (FWHM). The black contours show the distribution of integrated emission to help identify the main dense gas features. All plots use the same spatial scale and color code, which is indicated by wedges in the maps of B213. Coordinate centers, contour levels, and star symbols as in Fig. 2.