The National Science Foundation announced an agreement for a vast undersea observing network. Called the Ocean Observatories Initiative (OOI) it will provide a network of undersea sensors for observing complex ocean processes such as climate variability, ocean circulation and ocean acidification at several coastal, open-ocean and seafloor locations. Continuous data flow from hundreds of OOI sensors will be available to scientists, policy makers, students and the public. Remotely operated and autonomous vehicles go deeper and perform longer than submarines. Underwater samplers do in minutes what once took hours in a lab.