We are excited to announce the release of our flagship software, EFDC_Explorer Modeling System (EEMS). EEMS10.3 provides a fully integrated propwash module that predicts bottom velocities, bed shear and sediment resuspension using ship information, position, and speed that dynamically couples to the three-dimensional hydrodynamics of the waterbody. It also boasts a vastly refactored and enhanced eutrophication module to allow for defining of a general phytoplankton group. It also supports a general zooplankton group so that an unlimited number of zooplankton groups can be simulated. Other options include online background maps and more. A free Demo version is available for download.