B-field position angles vs. log of wavelength for I-band (magenta triangle), H-band (blue), K-band (green), HAWC+ 216 μm (red), and Planck 353 GHz (orange) data set weighted averages. Uncertainties are displayed as vertical colored lines, though only the 216 μm line extends outside its plot symbol. Two types of notional least-squares fits are indicated. The dashed black curve is a linear fit of BPA vs. wavelength, and the dotted gray curve is a power-law fit. Both fits indicate only very weak departures with wavelength from the mean BPA.