单项选择题
Your radar is set on a true motion display.Which of the following will NOT appear to move across the PPI scope（）.
A.Echoes from a buoy
B.Own ship's marker
C.Echo from a ship on the same course at the same speed
D.Echo from a ship on a reciprocal course at the same speed
点击查看答案&解析
相关考题
-
单项选择题
Your radar displays your ship off center．As you proceed on your course， your ship’s marker moves on the PPI scope while echoes from land masses remain stationary.What is this display called（）.
A.Off center
B.True motion
C.Stabilized
D.Head up -
单项选择题
Your ARPA has two guard zones.What is the purpose of the inner guard zone（）.
A.Alert the watch officer that a vessel is approaching the preset CPA limit
B.Warn of small targets that are initially detected closer than the outer guard zone
C.Guard against target loss during critical maneuvering situations
D.Sound an alarm for targets first detected within the zone -
单项选择题
Your ARPA has automatic speed inputs from the log．Due to currents，the log is indicating a faster speed than the speed over the ground.What should you expect under these circumstances（）.
A.The generated CPA will be less than the actual CPA
B.The generated TCPA will be later than the actual TCPA
C.The range of initial target acquisition will be less than normal
D.The targets true course vector will be in error
