相关考题
-
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
