The document discusses GDACS and the Virtual OSOCC. GDACS is a disaster monitoring and alert system that collects hazard data and issues color-coded alerts. It also includes the Virtual OSOCC, an online coordination platform. The Virtual OSOCC allows responders to exchange information during disasters. It supports coordination and situational awareness in the early stages of sudden-onset disasters. The document provides details on the tools and services provided by GDACS and guidelines for how different responders should use the Virtual OSOCC.