The closest point of approach (CPA) of a contact on a relative motion radar may be determined（）. -题库考试答案搜索网

The closest point of approach (CPA) of a contact on a relative motion radar may be determined（）.

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2022-02-24 18:30

A、immediately when the contact is noted on radar
B、only if the radar scope is watched constantly
C、after the contact has been marked at least twice
D、by an occasional glance at the radar

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正确答案

C

试题解析

标签：雷达及ARPA的使用

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