This dataset includes physical, chemical, biological, and optical In Situ data from the USS DE STEIGUER (AGOR 12), MELVILLE, MOANA WAVE, EL PUMA, ONRUST, and ED RICKETTS from August 30, 1992 to October 21, 1999. Data were submitted by US National Aeronautic and Space Administration; Goddard Space Flight Center and San Diego State University as part of the Marine Optical Characterization Experiment (MOCE) project. Data were collected using CTD, fluorometer, bottle, Secchi disk, and thermosalinograph. The Marine Optical Characterization Experiment (MOCE) and Marine Optical Buoy (MOBY) programs are part of the calibration/validation study for the United States' Ocean Color Program. These programs are funded by the National Aeronautic and Space Administration's (NASA) Earth Observing Systems (EOS) program and implemented by the National Oceanic and Atmospheric Administration, National Environmental Satellite and Data Information Service (NOAA/NESDIS) line office. MOBY is a moored buoy (38 ft, 2500 lbs) that houses state-of-the-art, high-resolution instrumentation which measures visible and near-infrared solar radiation entering and leaving the ocean. MOBY data are used for the vicarious calibration of ocean color satellite sensors. MOCE data, which are acquired from shipboard in-situ measurements, are primarily used to verify products derived from ocean color satellite imagery. This data accession includes in-situ data of MOCE cruises 1-5 between 1991 and 1999 as made available by the Goddard Space Flight Center from the SeaBASS database as of November 2000.