Radial profile of LOS velocities of GCs in comparison to the observed scatter in stellar light velocities (green shaded area). The blue shaded area shows the circular velocity profile of FCC 47 as obtained from the orbit-based dynamical model (Sect. 7). The colour of the GCs and FCC 47-UCD1 refers to their (g − z) colour in AB magnitudes taken from Jordán et al. (2015). We show all GCs with S/N >  3 Å⁻¹. The errorbars refer to the 1σ random uncertainty from fitting each GC 300 times.