A.detection
B.being detected
C.the detective
D.the detected
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A.radar transponder beacon
B.radar conspicuous beacon
C.radar calibration beacon
D.circular radiobeacon
A.off／standby
B.standby／off
C.standby／close
D.close／standby
A.keeping a close watch and lookout
B.taking a radar range and bearing
C.observing a radar target and listening to signals
D.keeping a well clear caution
A.immediately when the contact is noted on radar
B.only if the radar scope is watched constantly
C.after the contact has been marked at least twice
D.by an occasional glance at the radar
A.the radar reflectors reflect better signals
B.fog horn signals travel farther to sea
C.it is equipped with strobe lights
D.it has a reduced watch circle
最新試題
What provides little or no indication that a vessel is dragging anchor? （）
You are underway in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must（）.
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 you turn on the fast time constant (differentiator) control of a radar it will（）.
Which general statement concerning radar is FALSE?（）.
（）is not a job of the radar antenna.
You are underway at 5 knots and see on your radar a contact 10 miles directly astern of you. 12 minutes later，the contact is 8 miles directly astern of you. What is the estimated speed of the contact? （）
（）is not used in modern radar.
You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）
Which statement about an estimated position is TRUE?（）