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
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A.Relative
B.TRUE
C.Compass
D.Magnetic
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.stop your engines
B.sound two prolonged blasts of the whistle
C.sound the danger signal
D.slow to bare steerageway
A.Dead in the water
B.1 knot
C.10 knots
D.15 knots
A.Starting with a dash and extending radially outward from the target
B.As a broken line from center of PPI to the target
C.Starting with a dot and extending radially inward from the target
D.Starting with a dash and extending to the right of the target
最新試題
Your ARPA has two guard zones.What is the purpose of the inner guard zone（）.
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? （）
When navigating in thick fog with the radar on，you should（）.
You are underway in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must（）.
Which statement about an estimated position is TRUE?（）
When using the radar for navigating（）.
Radar reflectors are required for（）.
（）typically extends from close as 0.1 nautical miles out to 32 NM.
Although manual plotting for CPA works well，the workload can become overwhelming when confronted with（）.
（）is not used in modern radar.