The Alfvén Mach number from the SVS 13A magnetic field map is shown in the color scale. Here, the color white represents the trans-Alfvénic value of ﹩{{ \mathcal M }}_{{\rm{A}}}=1﹩, while red indicates the sub-Alfvénic regime. In this case, the map was produced using a moving window of ﹩0\mathop{.}\limits^{^{\prime\prime} }5﹩ with an associated error of 10°. The magnetic field morphology is superposed as white pseudovectors plotted every 5 pixels. The map was produced from the data imaged using robust = 1. The beam is shown as a blue ellipse in the bottom left corner, and the scale is shown in the bottom right corner of the map.