网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
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 vessel
B
at the same speed as your vessel
C
on the same course and speed as your vessel
D
on a reciprocal course at the same speed as your vessel
参考答案
参考解析
解析：
暂无解析
更多 “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” 相关考题
考题
According to the passage which of the following is true?[A] A fixed star refers a star that is always stationary on the sky.[B] Scientists can tell the motion of the earth from the motions of other five planets.[C] Ancient people had scanty knowledge about the movement of the stars.[D] All the stars on the sky can be seen all the year around.
考题
Radar display in which North is always at the top of the screen is a(n)______．A.unstabilized displayB.stabilized displayC.composition displayD.relative display
考题
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
The field coils _____and the armature _____. This is in fact the arrangement adopted for large, heavy duty alternators.A.are stationary / rotatesB.are stationary /is stationaryC.rotate / is stationaryD.rotate / rotates
考题
The field coils ______ and the armature(电枢) ______. This is in fact the arrangement adopted for large, heavy duty alternators.A.are stationary(固定的)/rotatesB.are stationary/is stationaryC.rotate/ is stationaryD.rotate/rotate
考题
My radar is not working．I require shorebased radar assistance．Is shorebased radar assistance ________ ？A.usedB.availableC.in useD.can be used
考题
The description Racon beside an illustration on a chart would mean a ______.A.radar conspicuous beaconB.circular radiobeaconC.radar transponder beaconD.radar calibration beacon
考题
A pattern that at the crest the motion of each particle is forward and at the trough it is backward relative to the wave's motion is ______．A.a trochoidB.a spheroidC.a loxodromeD.a carene
考题
When the relative motion display is selected all tracked objects will display ______ vectors．A.motionB.stationaryC.dynamicalD.flashing
考题
You have another ship overtaking you close aboard to starboard．You have 3 radar targets bearing 090° relative at ranges of 0.5 mile，1 mile，and 1.5 miles．In this case，the unwanted echoes are called ______．A.Multiple echoesB.SpokingC.Indirect echoesD.Side-lobe echoes
考题
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
Some of the larger birds can remain stationary in the air for several minutes.A:silent
B:seated
C:true
D:motionless
考题
Some of the larger birds can remain stationary in the air for several minutes.A:motionless
B:silent
C:seated
D:true
考题
Some of the larger birds can remain stationary in the air for several minutes.A:silent
B:motionless
C:seated
D:true
考题
单选题Your radar displays your ship off center．As you proceed on your course， your ship’s marker moves on the PPI scope while echoes from land masses remain stationary.What is this display called（）.A
Off centerB
True motionC
StabilizedD
Head up
考题
单选题Due to （） action of pistons some relative motion between parts in contact in the coolant supply and return system must occur.A
reciprocatingB
rotatingC
runningD
removing
考题
单选题As a ship moves through the water，it causes a wake，which is also moving forward relative to the sea. In addition to a fore and aft motion，this wake also has a(n)（）.A
downward and inward flowB
downward and outward flowC
upward and inward flowD
upward and outward flow
考题
单选题My radar is not working.I require shore based radar assistance.Is shore based radar assistance（）?A
usedB
availableC
in useD
can be used
考题
单选题When we say that two objects have relative motion, we mean （）.A
the distance between them remains the sameB
the distance between them is changingC
the position between them is not changingD
their positions to the earth remain the same
考题
单选题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? （）A
Dead in the waterB
1 knotC
10 knotsD
15 knots
考题
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
考题
单选题What is the function of an engine’s stationary parts?（）A
To add power to the engineB
To keep the engine firmly attached to its supporting baseC
To keep moving engine part in their proper relative positionsD
To rotate the crankshaft
考题
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
热门标签
最新试卷
