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- Master (Oceans or Near Coastal (Uninspected Fishing Industry Vessel)) »
- Q180 - Deck General
175. The signal man assisting the crane operator has his arm extended, his fingers closed, and his thumb pointing downward. This is the signal to __________.
The signal indicates lowering the boom; crane hand signals use a closed fist with thumb direction to control boom movement, distinguishing it from load movement signaled with an extended index finger.
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