Well, it may be VERY hard. But there are small gaps between the totes. So if all else fails...i guess you could try to use your "Telescopic Macrovision" to know where your robot is. lol
....or....shhhh....don't tell anyone....install a spy cam on your robot that sends a radio signal to a heads' up display discreetly mounted on your oi....shhh....don' t tell anyone...hehe