单项选择题 A cable used by helicopters for lifting or lowering persons in a pick-up operation is a（）.

单项选择题 A breeches buoy is being rigged from the shore to a stranded vessel. The initial shot line passed to the vessel is normally made fast to a（）.

单项选择题 You are proceeding to a distress site and expect large numbers of people in the water. Which statement is TRUE?（）