Sentry is a new, state-of-the-art underwater robot that can operate independently of the ship. It will be used on this mapping cruise to conduct highly detailed bathymetric maps of the sites for RSN nodes 1 and 3. This cruise is the first formal deployment of Sentry on a working oceanographic research cruise.
An Underwater Robot
Sentry is an autonomous underwater vehicle, an underwater robot that swims freely beneath the surface without being tethered to a ship. Equipped with a sophisticated RESON sonar system, Sentry can collect the data needed to make seafloor maps at 1-centimeter resolution, which is incredibly detailed for such maps.
Surveying Node Sites
Sentry will be preprogrammed to “fly” over the node sites along overlapping survey lines at a constant altitude above the seafloor. It runs on batteries and is propelled through the water using a series of thrusters that allow it to go up and over ridges, maneuver in any direction, and maintain its height above bottom even when pushed around by underwater currents