  Observations, analysis techniques and photometric properties of a
multi-narrowband survey of a 20 square-degree area of sky at +33 degrees
declination are described. The survey is conducted with the 3-meter
liquid-mirror telescope of the NASA Orbital Debris Observatory using
intermediate-bandwidth filters. These filters have central wavelengths ranging
from 455 to 948 nm, at intervals of 0.01 in log(wavelength) and give a spectral
resolving power of 44. In two spring observing seasons we have completed
observations in 16 bands. Our preliminary object catalog contains over 10^5
detections to a typical 50% completeness limit of m(AB) = 20.4. This paper
describes the observational techniques, data analysis methods, and photometric
properties of the survey. The survey is expected to provide object
classifications, spectral energy distributions and multi-narrowband redshifts
for over 10^4 galaxies and QSOs, for use in studies of galaxy and QSO
distributions, evolution and large-scale structure. It will also provide
photometry and spectral classifications for over 10^4 stars.
