Exemplary AMBER observations of HR Car. In the u,v-plane coverage, shown in the centre, solid lines connect visibility and phase observation with their respective u,v points, open circles are conjugated u,v points. Panels a) and d) show observations obtained on MJD 56 718.149, panels b) and c) on MJD 56 676.226, and panel f) on MJD  56 726.113. One baseline from the observation taken on MJD 55 311.024 is shown as a dashed line in the flux panel and in panel e), its u,v position is indicated by a cross.