A、at obscured objects
B、forward submerged targets
C、up exposed targets
D、for unseen objects
更多“Radar is used to not only to look（）,but also to measure their distances away from you.”相关的问题
A、Only a radar expert can determine if the radar is operating B、All radars have indicator lights and alarms to signal improper operation C、A radar range compared to the actual range of a known object can be used to check the operation of the radar D、The radar resolution detector must be energized to check the radar
A、The Master of the vessel must be on the bridge when the radar is in use B、The radar equipment is only required to be used in restricted visibility C、The use of a radar excuses a vessel from the need of a look-out D、This equipment must be used to obtain early warning of risk of collision
A、A.She must use this equipment to obtain early warning of risk of collision B、B.The use of a radar excuses a vessel from the need of a look-out C、C.The radar equipment is only required to be used in restricted visibility D、D.The safe speed of such a vessel will likely be greater than that of vessels without radar
A、Your speed must be reduced to bare steerageway B、A look-out is not required if the radar is on C、Fog signals are only required when a vessel is detected by radar D、The radar should always be kept on a short-range scale
A、Your speed must be reduced to bare steerage ways B、A look-out is not required if the radar is on C、The radar should always be kept on a short-range scale D、Fog signals are only required when a vessel is detected by radar
A、should never use radar bearings B、should only use radar bearings when the range exceeds the distance to the horizon C、can use radar information from one object to fix the position D、must use information from targets forward of the beam
A、can use radar information from one object to fix the position B、should never use radar bearings C、should only use radar bearings when the range exceeds the distance to the horizon D、must use information from targets forward of the beam
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