First-moment map of the H I emission calculated using the SoFiA-generated mask with a threshold of 5σ_rms and without dilation. The rainbow colour scale indicates the recessional (optical) velocity in km s⁻¹. The black ellipse in the lower right indicates the beam size, the grey lines are isovelocity contours separated by 40 km s⁻¹, and the small black star symbols indicate the locations of the optical centres of the galaxies in the group.