1. Working class ROVs
These devices are used to perform several tasks. They are equipped with mechanical "hands", or manipulators. With the help of manipulators of different sizes and capacities, ROVs are able to lift loads and, if necessary, cling to various objects under water.
ROVs of a heavy working class are devices suitable for carrying out serious work at great depths. They can pass under water to a depth of 3,000 meters and weigh up to 2,000 kilograms. Typically, such ROVs are equipped with several powerful manipulators, as well as a large number of sensors.