which can swim deeper and faster ROVS can handle conditions that are unsafe for human divers, like swimming in oil, sewage, and extreme cold. They do not get hungry or tired, and a serious accident is an irritation rather than a disaster. Some modern ROVS are small enough to carry around easily and transport by air, unlike diving equipment. The equipment for a technical diver-one who dives below a hundred feet -- weighs at least two hundred pounds.