A complete sample of 13 flat spectrum radio sources is investigated over a wide range of frequencies and spatial resolutions. SSC-calculations lead to the prediction of bulk relativistic motion in all sources. So far 6 out of 7 sources observed with sufficient dynamic range by means of VLBI show evidence for apparent superluminal motion.
Accurate positions have been measured at Parkes for 451 40 radio sources between declinations 4� and 20�. For most of the sources the r.m.s. uncertainty is � ION arc in each coordinate. Optical identifications are suggested for 94 sources, of which 22 are galaxies and 72 are possible quasi.stellar objects.
Radio positions and optical identifications for a complete sample of southern flat-spectrum radio sources - I. Region 06h to 18h
