When a survival craft drill is held，the person in charge must insure that（）.<br>A:all survival craft are lowered to the water，launched，and operated for thirty minutes<br>B:all davits used for launching liferafts are operated<br>C:each emergency position indicating radio beacon is tested for thirty minutes<br>D:the helicopter pad landing lights are operating in a quick-flashing mode

When a survival craft drill is held，the person in charge must insure that（）.
A:all survival craft are lowered to the water，launched，and operated for thirty minutes
B:all davits used for launching liferafts are operated
C:each emergency position indicating radio beacon is tested for thirty minutes
D:the helicopter pad landing lights are operating in a quick-flashing mode

出自：海船船员证

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