The rover crane should have a second camera mounted directly above the grab that you can switch to. Sometimes the rover or other object obscures the camera on the jib, which is why it is no longer possible to assess where the grab is or how it can grab the rock. This then becomes a gamble or forces you to change position because of a boulder. Unnecessary and pointless in my opinion. In reality, a crane driver must also have a full overview of where his grab is located if he has no second person to instruct him.