Position (i.e. offset along the major axis from the galaxy centre) vs. velocity diagram along the kinematic major axis of the molecular disc. The plotted velocity is along the line of sight (LOS). The blue and red contours show, respectively, the iso-density contours of the galaxy and the best-fit model found with ^3DBAROLO, both starting from 2σ. The horizontal black solid line indicates the systemic velocity. The yellow circles denote the best-fit projected rotation velocity.