单项选择题
Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel? （）
A.Set and drift of the current B.Relative track information C.Predicted time of CPA D.Initial range of acquisition
单项选择题 When you turn on the fast time constant (differentiator) control of a radar it will（）.
单项选择题 When will the float-free emergency position indicating radiobeacon be activated after abandoning ship? （）
单项选择题 When using the radar for navigating（）.
