  We have conducted VLBI observations of water maser and radio continuum
emission in the nucleus of NGC 3079. The 22 GHz maser emission arises in
compact clumps, distributed along an axis that is aligned with the major axis
of the galactic disk. The velocities of the masers are consistent with their
lying in the inner parsec of a molecular disk rotating in the same sense as the
rest of the galaxy. However, the velocity field has a significant
non-rotational component, which may indicate supersonic turbulence. The bright
maser emission is not coincident with any detected compact 22 GHz continuum
source, suggesting the high apparent luminosity of the maser may not due to
beamed amplification of continuum emission. We observed two compact continuum
sources that have inverted spectra between 5 and 8 GHz, and steep spectra
between 8 and 22 GHz. NGC 3079 may be a nearby, low-luminosity example of the
class of compact symmetric gigahertz-peaked spectrum (GPS) radio sources. We
detected a third continuum component that lies along the same axis as the other
two, strongly suggesting that this galaxy possesses a nuclear jet. Faint maser
emission was detected near this axis, which may indicate a second population of
masers associated with the jet.
