During a 2016 cruise to Palau, an X-Band, VV polarization Doppler Marine Radar (DMR) was installed on the R/V Roger Revelle. The DMR’s capabilities to receive Doppler velocity information is utilized in order to find surface currents. An algorithm was developed to extract full Doppler velocity vectors from radially averaged data on a rotating antenna every 1.5 minutes for all 10 days of the cruise. This algorithm can also produce fully 2-D Doppler velocity vector maps for locations seen from a variety of look directions as the ship moves. Statistical analysis is done to show that the time series of Doppler velocity has dependence on three crucial variables: ship motion, wind speed, and surface current. A functional relationship is determined from this. The overall validity of this functional relationship is analyzed.