The Seaview Systems long-distance remotely operated vehicle (LDROV) can travel up to 10,000 ft (3,000 m) on its 0.6 inch (1.5 cm) fiber-optic umbilical tether, and fit through a manhole only 20 inch (50.8 cm) in diameter. Measuring 17 inch x 18 inch x 41 inch (43 cm x 46 cm x 104 cm), the LDROV weighs 100 lb (45 kg). The top surface of its plastic frame has freewheeling wheels to make it easy for the robot to move smoothly and quickly through pipelines and tunnels. It's driven by four 300W brushless DC motors that give the LDROV a total forward thrust of 72 lb (32.6 kgf). A 360-degree pan/orbit/zoom color camera and two 530-line color CCD cameras are included, as well as sonar, and sensors for heading, pitch and roll, and depth. A fiber-optic telemetry system provides up to three video channels, four RS232 channels, and two RS485 channels.
(Source: Seaview Systems)