ABSTRACT The most recent release of the National Oceanic and Atmospheric Administration (NOAA) Dispersant Mission Planner, DMP2, is a valuable tool for the estimation of system performance involving the application of chemical dispersants on oil spills. The assessment of system performance is critical for both planning and realtime operational use. The DMP2 can be used for the assessment of fixed-wing aircraft, helicopters and vessels as platforms for the application of dispersants, allowing the user to compare and optimize the performance of each system. The Mission Planner can also be used to calculate the Effective Daily Application Capacity (EDAC) for a specified application system operating from a pre-designated staging location. The DMP2 provides a user-friendly tool for the determination of any dispersant application system'S EDAC as currently required by U.S. Coast Guard regulations for a given Captain of the Port (COTP) Zone. The authors (and developers of the DMP2) describe the underlying logic of the model and illustrate its use with a number of examples.