(I) The remotely operated vehicle (ROV), Jason II, resembles its predecessor, but nearly every component has been much improved. (II) To start with, it is bigger, so it can retrieve more material from the ocean floor. (Ill) Further, a second manipulator arm has been added which has increased maneuverability and power. (IV) Another advantage is the fact that it can function at greater depths. (V) Indeed, a lot of people feel that the costs of ROV technology are in excess of its usefulness.