  The C-Band All-Sky Survey (C-BASS) is an experiment to image the whole sky in
intensity and polarization at 5 GHz. The primary aim of C-BASS is to provide
low-frequency all-sky maps of the Galactic emission which will enable accurate
component separation analysis of both existing and future CMB intensity and
polarization imaging surveys. Here we present an overview of the experiment and
an update on the current status of observations. We present simulation results
showing the expected improvement in the recovery of CMB and foreground signals
when including C-BASS data as an additional low-frequency channel, both for
intensity and polarization. We also present preliminary results from the
northern part of the sky survey.
