Position-velocity diagrams along major (top) and minor kinematical axes (bottom) of UGC 11919. The blue, pink, and green (black, grey, and light grey in printed version) lines represent the 0.5, 3, and 4 mJy/beam levels of the observed and model data cubes, respectively. Left and right panels correspond to the warped model and the model including non-circular motions, respectively.