Generally no. The crane operator relies on their rigger for guidance, and uses a radio for communication when they can't see what's below them.
Needless to say, operators and riggers have to trust each other greatly, and some operators refuse to work when their favourite riggers are out sick!
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"Build me to the heavens, and Life never stops"
"Live as if the world were as it should be, to show it what it can be"
-Angel
"Prayers are fleeting and wars are forgotten, but what is built endures"
-Ambassador DeLenn, Babylon 5
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