Intensity-weighted peak velocity (first moment) maps of CH₃CN (12₄−11₄) for the model simulations (top row), synthetic ALMA observations (middle row), and synthetic NOEMA observations (bottom row,) shifted to a distance of 800 pc (left column) and 2000 pc (right column). Each panel contains four sub-panels corresponding to the image inclined by 10° (top left), 30° (top right), 60° (bottom left), and 80° (bottom right). The contours correspond to 1.37 mm continuum as shown in Fig. 3. The synthesised beam is shown in the bottom left corner and a scale bar in the bottom right corner of each set of synthetic observations.