  We present details of the Behind The Plane survey of IRAS galaxies, which
extends the PSCz survey to cover the 93% of the sky with complete and reliable
IRAS data from the Point Source Catalog. At low latitudes, our catalogue is not
complete to 0.6Jy, but the incompleteness is physically understood and can be
corrected for. IRAS galaxies at low latitudes are heavily or completely
obscured optically, and are heavily outnumbered by Galactic sources with
similar IRAS properties. We have used radio, optical, mm, near and far-infrared
data to identify the galaxies, and the 2D catalogue is now complete. We have
used optical and HI spectroscopy to obtain redshifts for the galaxies; the
southern spectroscopy is completed and the north nearly so.
