Preventer bars are fitted on lifeboat releasing hooks to prevent（）.<br>A:the falls from unhooking if the releasing gear is operated accidentally while the boat is being lowered<br>B:operation of the release lever until the boat is waterborne<br>C:the falls from rehooking after they have been released<br>D:accidental unhooking when the falls become slack

Preventer bars are fitted on lifeboat releasing hooks to prevent（）.
A:the falls from unhooking if the releasing gear is operated accidentally while the boat is being lowered
B:operation of the release lever until the boat is waterborne
C:the falls from rehooking after they have been released
D:accidental unhooking when the falls become slack

出自：海船船员证

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