CO(3−2) moments maps of NGC 1808 in the central 22″ (∼1 kpc). Left: integrated intensity map (0th moment) of CO(3−2). Middle: mean velocity (1st moment). Right: velocity dispersion (2nd moment). The synthesized beam is indicated as the red ellipse in the bottom left corner of the integrated intensity map. The main morphological features of the CO(3−2) emission are indicated in the 0th moment map: the ILR ring (dashed pink ellipse) projected to the galaxy inclination, i = 57°; the SF ring (dotted pink ellipse) projected to the same i = 52° of the ionized and H₂ gas detected with SINFONI by Busch et al. (2017); the pink arrows indicate the position of the filamentary structure connecting the rings; and the black arrows show the outer winding spiral arms. The black cross corresponds to the phase center of our observations, listed in Table 1.