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单选题
The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.
A
transmitter
B
antenna system
C
indicator
D
modulator
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In order to insure that the racon signal is visible on your 3 cm radar, the ______.A.10 cm radar should be placed on stangby or turned offB.gain control should be turned to maximumC.radar should be stabilized, head upD.rain clutter control should be off but, if necessary, may be on low
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单选题You are in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must（）.A
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sound two prolonged blasts of the whistleC
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单选题You hear the fog signal of another vessel forward of your beam.Risk of collision may exist.You MUST（）.A
Reduce speed to bare steeragewayB
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单选题How can vessel personnel detect the operation of a SART in its vicinity?（）A
A unique radar signal consisting of a blip code radiating outward from a SART's position along its line of bearingB
A unique two tone warbling signal heard on VHF-FM ch-70C
A unique two tone alarm signal heard upon the automatic unmuting of the 2182 kHz radiotelephone automatic watch receiverD
The SART signal appears as a target which comes and goes; the effect of heavy swells on the SART
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单选题Which signal is detected as originating from a SART?（）A
The Morse code distress series S-O-S repeated 3 times followed by DE and the vessel's call signB
A line of blip code on a radar screen outward from the SART's position along its line of bearingC
A line of blip code on a radar screen inward from the SART's position to its own ship along its line of bearingD
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单选题You are underway in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must（）.A
stop your enginesB
sound two prolonged blasts of the whistleC
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slow to bare steerageway
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单选题What would most likely prevent a SART’s signal from being detected?（）A
Signal absorption by the ionosphereB
Heavy sea swellsC
The rescue personnel were monitoring the 10-cm radarD
The rescue personnel were monitoring the 3-cm radar
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单选题A vessel is approaching from dead ahead． Both of her sidelights are visible and her range lights are in line. Which of the following could you do first?（）.A
Sound one blast of the whistleB
Alter course to starboardC
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The SART should be placed in water immediately upon activationB
The SART should be held as high as possibleC
Switch the SART into the high power positionD
If possible，the SART should be mounted horizontally so that its signal matches that of the searching radar signal
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单选题What does a SART signal sound or look like?（）A
It transmits SOS and the vessel's name and position in slow speed Morse CodeB
It will appear on a radar unit's PPI as a line of dots radiating outward with the innermost dot indicating the SART's positionC
It will appear on a radar unit's PPI as a line of dots radiating outward with the outermost dot indicating the SART's positionD
None of the above
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单选题（）sends a radio signal from the bottom of the ship to the sea-bed,from which it is reflected.A
The marine sextantB
The chronometerC
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单选题In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. You should（）.A
stop your enginesB
sound the danger signal at two-minute intervalsC
hold course and speed until the other vessel is sightedD
take avoiding action as soon as possible
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单选题In order to ensure that a RACON signal is displayed on the radar，you should（）.A
increase the brilliance of the PPI scopeB
turn off the interference controls on the radarC
use the maximum available range settingD
increase the radar signal output
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单选题A vessel is “in sight” of another vessel when（）.A
she can be observed by radarB
she can be observed visually from the other vesselC
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her fog signal can be heard
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单选题If there is any doubt as to the proper operation of a radar，which statement is TRUE?（）.A
Only a radar expert can determine if the radar is operatingB
All radars have indicator lights and alarms to signal improper operationC
A radar range compared to the actual range of a known object can be used to check the operation of the radarD
The radar resolution detector must be energized to check the radar
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单选题Which statement concerning maneuvering in restricted visibility is FALSE?（）.A
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A vessel which hears a fog signal forward of her beam shall stop her enginesC
A vessel which hears a fog signal forward of the beam shall navigate with cautionD
If a vessel determines by radar that a close-quarters situation is developing，she shall take avoiding action in ample time
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单选题When the power of SART is on, it will（）.A
transmit distress signalB
send response signalC
transmit the signal of ship‟s positionD
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单选题You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）A
Starting with a dash and extending radially outward from the targetB
As a broken line from center of PPI to the targetC
Starting with a dot and extending radially inward from the targetD
Starting with a dash and extending to the right of the target
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单选题The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.A
magnetronB
receiverC
indicatorD
modulator
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