Get a Grip

To ensure the tightest grip with the manipulator, press the close button several times. This adds a little more closing force with each press and also helps seat the object in the jaws.

Once you've grasped the object, make slow movements with the ROV. The water density will put a lot of force on the object and you are likely to lose it if you jerk the ROV.

Make sure you have a firm grip on the object, or have a net under it before you release it.

If you need to pull the ROV up in the air with the object in the manipulator, remember, the object's in-air weight might be significantly higher than its in-water weight.