Remote sensing has become an important tool for the management of the marine environment. Currently, researchers are able to map several important facets of the marine environment from space. This includes chlorophyll-a, ocean salinity, and sea surface temperature. In addition, researchers are able to use satellite data to assist in mapping out marine regions including seagrasses, corals, mangroves, wetlands, and even shallow benthic environments. Satellite data currently enable the researcher to determine significant wave height and ocean currents. They are being used to track biota ranging from fish, whales, turtles, and even large birds. Oil spill remote sensing continues to develop apace. This chapter briefly reviews these technologies and gives examples of the application to the various disciplines.