Meet the LT2-F-W Robot from SuperDroid Robots: a watertight inspection robot that can check areas normally out of reach. It uses a 30x optical zoom camera to offer a 360-degree view. It comes with LED lights to illuminate dark areas. This tethered robot can travel up to 500ft.
The robot chassis is made from 3003 aluminum coated with a durable epoxy bed liner paint. Its tracks are driven by IG52 gear motors. More info is available here.