单选题In launching a lifeboat，when should the tricing pendants be released?（）.ABefore the boat is lowered from the stowage positionBAs soon as the boat-fall blocks clear the davit headCAfter the limit switch is activatedDAfter all people have been embarked
单选题
In launching a lifeboat，when should the tricing pendants be released?（）.
A
Before the boat is lowered from the stowage position
B
As soon as the boat-fall blocks clear the davit head
C
After the limit switch is activated
D
After all people have been embarked
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