Left Panel: DeCaLS optical image in the g, r, z filters overlaid with the H I contours from the 25″ × 18″ datacube used for the analysis in this paper. Levels increase as 4.6 × 10¹⁸ × 2ⁿ cm⁻² (n = 0, 1, 2, 3), where the first contour marks the mean S/N = 3 detection limit. The PSF is shown in the bottom-right corner. Note the H I overlay in color with also the 32 × 23 ″ map. Right Panel: velocity field of the H I gas in LSB-D. The systemic velocity (v_sys = 1214 km s⁻¹) is marked by the thick black iso-velocity contour, the other contour levels are shown in the bottom-left corner. The dashed and dashed-dotted lines mark the directions of the major (141°) and minor axes (51°) of the H I disk, respectively.