ADCP continuous profiles of ocean currents and acoustic backscatter between 20 and 500 meters deep are measured along the shiptrack from a hull-mounted 150 kHz Acoustic Doppler Current Profiler (ADCP). The ADCP data are averaged over 3-minute intervals; typically sixty 8-meter depth bins are recorded. On NOAA vessels, ADCP data collection may be altered by the multi-frequncy fishery acoustics sampling scheme.