View of the CH₃OH maser features detected around G37.43+1.51 (Table A.5). Same symbols as in Fig. 2. The assumed velocity of the massive SFR region is km s^-1 (López-Sepulcre et al. 2010). The two arrows indicate the direction, and not the actual position, of the red- and blueshifted lobes of the C¹⁸O-outflow (°; López-Sepulcre et al. 2010). The dashed line is the best linear fit of the CH₃OH maser features (PA_CH3OH = −64° ± 5°).