According to oceanographer John Delaney, Sentry looks like “a flying bar of soap.”
Sentry can dive up to 4,500 meters deep and is powered by over 1,000 lithium-ion batteries that have been adapted to handle the underwater pressure. Using a mass spectrometer, Sentry can detect very small quantities of chemicals in the water.
Sentry also has the ability to adjust it’s course on the fly and will hopefully give scientists a 3 dimensional image of the oil plume.
Click through for a video of what Sentry can do and also read about Waldo the glider searching for oil from the BP disaster.