  The Fan Observatory Bench Optical Spectrograph (FOBOS) is intended for
single-object optical spectroscopy at moderate resolution (R~1500-3000) using a
fiber-fed, bench-mounted design to maintain stability. Whenever possible, the
instrument uses off-the-shelf components to maintain a modest cost. FOBOS
supports Galactic astronomy projects that require consistently well-measured
(~5 km/sec) radial velocities for large numbers of broadly distributed and
relatively bright (V<14) stars. The spectrograph provides wavelength coverage
throughout the optical spectrum, although the instrument design was optimized
for use in the range 470-670 nm. Test data indicate that the instrument is
stable and capable of measuring radial velocities with precision better than 3
km/sec at a resolution of R~1500 with minimal calibration overhead.
