  We have used spectra of hot stars from the RAVE Survey in order to
investigate the visibility and properties of five diffuse interstellar bands
previously reported in the literature. The RAVE spectroscopic survey for
Galactic structure and kinematics records CCD spectra covering the 8400-8800
Ang wavelength region at 7500 resolving power. The spectra are obtained with
the UK Schmidt at the AAO, equipped with the 6dF multi-fiber positioner. The
DIB at 8620.4 Ang is by far the strongest and cleanest of all DIBs occurring
within the RAVE wavelength range, with no interference by underlying absorption
stellar lines in hot stars. It correlates so tightly with reddening that it
turns out to be a reliable tool to measure it, following the relation E(B-V) =
2.72 (+/- 0.03) x E.W.(Ang), valid throughout the general interstellar medium
of our Galaxy. The presence of a DIB at 8648 Ang is confirmed. Its intensity
appears unrelated to reddening, in agreement with scanty and preliminary
reports available in the literature, and its measurability is strongly
compromised by severe blending with underlying stellar HeI doublet at 8649 Ang.
The two weak DIBS at 8531 and 8572 Ang do not appear real and should actually
be blends of underlying stellar lines. The very weak DIB at 8439 Ang cannot be
resolved within the profile of the much stronger underlying hydrogen Paschen 18
stellar line.
