Deploying an Argo float

Deploying an Argo float. These floats are battery-powered and neutrally buoyant so they can drift at depth. Every 10 days, the floats rise to the surface while measuring temperature and salinity. When they reach the surface, the floats transmit the data to satellites, which determine the floats’ positions.  Image courtesy of John Poling, California Polytechnic State University.