Channel map of the CO emission from the A_Blue outflow. The velocity of each image is listed in the upper right corner. The position of MM1a isindicated by the red star. The purple filled circle gives the position of the Class I CH₃ OH maser source 1 (see Table 7), only at velocities where the maser is present. The orange dashed lines show the fiducial directions of the F3 and F4 filaments as per Fig. 1. Contours are plotted at the 5,10, 20, 40, 50, 60, 70 and 80 σ level of the ALMA CO image (where σ = 22.0 mJy bm⁻¹).