A.one targetB.two targetsC.three targetsD.a large numbe……

单项选择题（）typically extends from close as 0.1 nautical miles out to 32 NM.

A.EBL
B.VRM
C.CRT
D.target tracking range

单项选择题（）is not used in modern radar.

A.EBL
B.VRM
C.CRT
D.Grease pencil

单项选择题（）is not a job of the radar antenna.

A.To receive the high-frequency pulses from the transmitter
B.To focus the pulses into a beam，and send them into space
C.To pick up reflected pulses coming from objects that have been struck by the beam
D.To reflect microwaves

单项选择题You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced? （）

A.Relative
B.TRUE
C.Compass
D.Magnetic

单项选择题You are underway in thick fog. You have not determined if risk of collision exists. Which statement is TRUE?（）.

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