Zooglider and the sampling of the California Current System

The Zooglider is an autonomous vehicle developed at the Scripps Institution of Oceanography with support them the Gordon and Betty Moore Foundation. It is equipped with a low power optical imaging system, dual frequency sonars (200/1000 kHz), plus standard oceanographic sensors. It is able to resolve mesozooplankton within a well-defined sample volume, at a vertical scale of 5 cm, while making concurrent physical and acoustic measurements. 

The Zooglider uses its variable buoyancy to an sink to a depth of up to 400 meters before resurfacing again. As it sinks, it used the hydrodynamics of its foils to provide forward propulsion, much like a glider in air. When it surfaces, it sends location information to the lab via satellite, and receives instructions  in return. It can stay out to sea for a number of weeks and is then recovered and the data downloaded from its sensors.