  We present neutral hydrogen observations for a sample of eight nearby,
late-type, edge-on galaxies. All of the galaxies have been well resolved in the
radial direction, while six have also been well resolved in the vertical
direction. We find that each of the galaxies has approximately the same maximum
surface brightness temperature throughout its disc. We argue that
self-absorption is the main cause of this phenomenon and that subsequent
decompositions will require a treatment of this.
