  We present the HI-MaNGA programme of HI follow-up for the Mapping Nearby
Galaxies at Apache Point Observatory (MaNGA) survey. MaNGA, which is part of
the Fourth phase of the Sloan Digital Sky Surveys (SDSS-IV), is in the process
of obtaining integral field unit (IFU) spectroscopy for a sample of ~10,000
nearby galaxies. We give an overview of the HI 21cm radio follow-up observing
plans and progress and present data for the first 331 galaxies observed in the
2016 observing season at the Robert C. Bryd Green Bank Telescope (GBT). We also
provide a cross match of the current MaNGA (DR15) sample with publicly
available HI data from the Arecibo Legacy Fast Arecibo L-band Feed Array
(ALFALFA) survey. The addition of HI data to the MaNGA data set will strengthen
the survey's ability to address several of its key science goals that relate to
the gas content of galaxies, while also increasing the legacy of this survey
for all extragalactic science.
