1 INTRODUCTION

2 OBSERVATIONS AND DATA REDUCTION
2.1 Instrumental set-up and calibration

3 CANDIDATES IDENTIFICATION

4 PLANETARY NEBULAE LINE-OF-SIGHT VELOCITIES
4.1 Errors on the velocity measurements
4.2 Absolute velocity calibration

5 RESULTS
5.1 The final PN Velocity sample
5.2 The radial velocity dispersion profile
5.3 PNe as tracer of the ICL

6 SUMMARY AND CONCLUSIONS