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Which one of the followings does not limit the effective range of radar ________．
A.Pulse width
B.Pulse repetition frequency
C.Peak power
D.Target brightness
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材料：What advantages does the eye have over the radar ？The eye has the following advantages： ReliableSensitive to colorCan assess headingCan identify small targetsCan see light configurationsCan assess ship typesCan identify conspicuous marksCan identify flashing lights Has better discriminationCan see changing weather patternsCan see effect of sea on vesselNot affected by blind arcs (if observer moves)．问题： BLIND ARCS mean ______ ．A.the arcs from which one can not see certain objectsB.the arcs which are blindC.the black arcsD.the arcs from which one can see certain objectsThis paragraph is a ______ ．A.a clause of a contractB.an explanation of advantage of eyes over radarC.a requirement from a governmentD.an article of ColregDISCRIMINATION means the ______ ．A.provisionB.dimensionC.distinctionD.permissionThe eye is more ______ than radar．A.distinguishableB.reasonableC.controllableD.reliable请帮忙给出每个问题的正确答案和分析，谢谢！
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Increase the STC setting to reduce close-in spurious signalsC
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单选题A navigator fixing a vessel’s position by radar （）.A
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单选题Which one of the followings does not limit the effective range of radar（）.A
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A vessel shall proceed near the other vessel on her starboard side on the narrow channel since it is safe and practicableB
A vessel shall avoid proceeding near the starboard outer limit of a narrow channel as long as it is safe and practicableC
A vessel shall avoid proceeding along the channel because it is not safe and practicableD
A vessel shall proceed near the starboard outer limit of a narrow channel to the degree in which it is safe and practicable
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单选题How can a SART’s effective range be maximized? （）A
The SART should be placed in water immediately upon activationB
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high-pressure steam-driven air-ejectorB
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单选题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 steerage waysB
A look-out is not required if the radar is onC
The radar should always be kept on a short-range scaleD
Fog signals are only required when a vessel is detected by radar
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critical dilution lineD
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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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Liquids with different viscosities will always have the same specific gravityB
Liquids with different viscosities will never have the same specific gravityC
Viscosity and specific gravity are directly proportionalD
Viscosity and specific gravity are not related in that one does not define or limit the other
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单选题The mere inclusion of an arbitration clause in a bill of lading to which the Hague Rules apply as a matter of contract does not deprive the carrier（）the one year time limit.A
byB
toC
ofD
off
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单选题Which of the following radar contacts will present the most immediate danger?（）.A
A vessel on the starboard bow whose bearing is changing and range is decreasingB
A vessel on the starboard bow whose bearing is steady and range is increasingC
A vessel on the port bow whose bearing is steady and range is decreasingD
A vessel on the port bow whose bearing is changing to the left and range decreasing
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单选题When using the radar for navigating（）.A
the best fix is obtained by using a tangent bearing and a rangeB
and using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearingsC
and using ranges，the most rapidly changing range should be measured lastD
and crossing a radar range of one object with the visual bearing of a second object，the two objects should be 80°to 110°apart
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Anti-seasickness medicineB
Immersion suitsC
AxesD
Lifebuoys
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