With Titan, SeaView is able to perform inspections in tunnels with diameters up to 16ft without using an umbilical, thus enabling surveys at lengths to 32,000ft (10km) and beyond. Titan utilizes Lithium ion battery packs and incorporates a set of booms which open in the tunnel, much like an umbrella, to capture energy from the flowing water for locomotion. Cameras are positioned evenly around the perimeter for a 360 degree view of the tunnel. High efficiency LED lighting provide sufficient illumination to produce a high quality video record of the entire length of the survey traverse. Titan’s profiling sonar measures the internal surfaces of the tunnel including sediment depth and its payload can be configurable with many sensor suites.