How should you signal the crane operator to hoist?（）.<br>A:With foremarm vertical and forefinfer pointing up ,move hand in small horizonal circles<br>B:With arm ertended downwards and forefinger pointing down,move hand in small horizontal crecles<br>C:Extend arm with fingers closed and thumb pointing upward<br>D:Place both fists in front of the body with the thumbs pointing outward

How should you signal the crane operator to hoist?（）.
A:With foremarm vertical and forefinfer pointing up ,move hand in small horizonal circles
B:With arm ertended downwards and forefinger pointing down,move hand in small horizontal crecles
C:Extend arm with fingers closed and thumb pointing upward
D:Place both fists in front of the body with the thumbs pointing outward

出自：海船船员证

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