Abstract: A remotely operated underwater vehicle for cleaning surfaces submerged in water, the underwater vehicle having a first side, a second side, a propulsion means, a plurality of trimming means, a first buoyancy means attached to the first side and a second buoyancy means attached to the second side. Elements of the plurality of trimming means are arranged on opposite sides of the centre of gravity of the vehicle and at least one of the plurality of trimming means has a movable mass and a displacement region into which the movable mass can move. The center of gravity of the vehicle is automatically shifted when the vehicle is accelerating or changes orientation, in which the first buoyancy means provides more buoyancy than the second buoyancy means such that the center of buoyancy is located above the center of gravity of the vehicle irrespective of the orientation of the vehicle.