ERMA Gulf Response, powered by Environmental Response Management Application (ERMA), is a web-based Geographic Information System (GIS) tool designed to assist both emergency responders and environmental resource managers who deal with incidents that may adversely impact the environment. This application is currently assisting with response operations for the Deepwater Horizon spill and data regarding this incident is displayed here and updated daily. ERMA is also assisting in resource management decisions in support of Natural Resource Damage Assessment.