单项选择题
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
A.relative display
B.composite display
C.stabilized display
D.unstabilized display
单项选择题 A radar display in which North is always at the top of the screen is a(n)（）.
单项选择题 A radar contact will remain stationary on a relative motion radar display only when it is（）.
单项选择题 A FICTIVE LINE DISPLAYED ON THE RADAR SCREEN SEPARATING THE FAIRWAY FOR INBOUND AND OUTBOUND VESSELS SO THAT THEY CAN SAFELY PASS EACH OTHER defines（）.