单项选择题
The most probable position of the object of a search at any given time is the（）.
A.datum B.estimated position C.search point D.initial point
单项选择题 The key to rescuing a man overboard is（）.
单项选择题 The indication of a slipping anchor is a(n)（）.
单项选择题 The Coordinator Surface Search (CSS) in a SAR situation should display by night（）.
