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Your radar is set on a true motion display．Which of the following will NOT appear to move across the PPI scope ________．
A.Echoes from a buoy
B.Own ship's marker
C.Echo from a ship on the same course at the same speed
D.Echo from a ship on a reciprocal course at the same speed
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更多 “ Your radar is set on a true motion display．Which of the following will NOT appear to move across the PPI scope ________．A.Echoes from a buoyB.Own ship's markerC.Echo from a ship on the same course at the same speedD.Echo from a ship on a reciprocal course at the same speed ” 相关考题
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The closest point of approach ( CPA ) of a contact on a relative motion radar may be determined ______.A.immediately when the contact is noted on radarB.only if the radar scope is watched constantlyC.after the contact has been marked at least twiceD.by an occasional glance at the radar
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单选题In determining safe speed，the Rules list all of the following as factors which must be taken into account EXCEPT the（）.A
limitations of radar equipmentB
presence of background lights at nightC
maximum horsepower of your vesselD
maneuverability of your vessel
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单选题How should you signal the crane operator to move slowly（）.A
Use one hand to give any motion signal，and place the other hand motionless in front of the hand giving the motion signaB
Extend arm with the thumb pointing up，and flex the fingers in and out for as long as the load movement is desiredC
First tap your elbow with one hand and then proceed to use regular signalsD
First tap the top of your head with your fist and then proceed to use regular signals
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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An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes?（）.A
Their bearing is almost constant，even when the true bearing of the contact changes appreciablyB
They always appear on a bearing of 90°from the true bearing of the contactC
The indirect echoes usually appear in shadow sectorsD
When plotted，their movements are usually abnormal
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单选题Which of the following is true regarding Label Distribution Protocol （LDP）？（）A
It is a label distribution protocol for MPLSB
It is a set of procedures and messages by which LSRs establish Label Switch Paths （LSPs） through a networkC
Tag distribution Protocol （TDP） was the basis for LDPD
All of the above are true
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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
考题
单选题The closest point of approach (CPA) of a contact on a relative motion radar may be determined（）.A
immediately when the contact is noted on radarB
only if the radar scope is watched constantlyC
after the contact has been marked at least twiceD
by an occasional glance at the radar
考题
单选题A radar contact will remain stationary on a relative motion radar display only when it is（）.A
on the same course as your vesselB
at the same speed as your vesselC
on the same course and speed as your vesselD
on a reciprocal course at the same speed as your vessel
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单选题At 2200 you take the following loran readings: 9960-W-15064.5; 9960-Y-43954.8. Which statement is TRUE? （）A
The current is floodingB
You are being set to the left of the trackC
The set is towards the southwestD
The drift is 0.6 knot.
考题
单选题Your radar is set on a true motion display.Which of the following will NOT appear to move across the PPI scope（）.A
Echoes from a buoyB
Own ship's markerC
Echo from a ship on the same course at the same speedD
Echo from a ship on a reciprocal course at the same speed
考题
单选题How should you signal the crane operator to move slowly?（）.A
Use one hand to give any miotion signal , and place the other hand motionless in front of the hand giving the motion signalB
Extend arm with the thumb pointing up , and flex the fingers in and out for as long as the load movement is desiredC
First tap your elbow with one hand , and then proceed to use regular signalsD
First tap the top of your head with your first , and then proceed to use regular signals
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