单项选择题
A.Watching the compass bearing of an approaching vessel B.Systematic observation of objects detected by radar C.Long-range radar scanning D.All of the above
Which general statement concerning radar is FALSE?（）.A....
单项选择题Which general statement concerning radar is FALSE?（）.
A.Raising the antenna height increases the radar range B.The ability of radar to detect objects is unaffected by weather conditions C.Radar bearings are less accurate than radar ranges D.Radar should be checked regularly during clear weather to ensure that it is operating properly
Which condition indicates that your radar needs mainten...
单项选择题Which condition indicates that your radar needs maintenance?（）
A.Serrated range rings B.Indirect echoes C.Multiple echoes D.Blind sector
Which ARPA data should you use in order to determine if...
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
