Lines on a chart which connect points of equal magnetic variation are called ______.
A.magnetic latitudes
B.magnetic declinations
C.dip
D.isogonic lines
第1题:
The compass rose on a nautical chart indicates both variation and ______.
A.deviation
B.annual rate of variation change
C.precession
D.compass error
第2题:
How is the annual rate of change for magnetic variation shown on a pilot chart? ______.
A.Gray lines on the uppermost inset chart
B.Red lines on the main body of the chart
C.In parenthesis on the lines of equal magnetic variation
D.Annual rate of change is not shown
第3题:
An isotherm is ______.
A.a line on a weather map connecting equal points of both temperature and pressure
B.an instrument that measures the climatological effects of temperature
C.a line connecting points of equal barometric pressure on a weather map
D.a line connecting points of equal temperature on a weather map
第4题:
How is variation indicated on a small-scale nautical chart?______.
A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts
第5题:
changes in the earth's magnetic field
nearby magnetic land masses or mineral deposits
magnetic influence inherent to that particular vessel
the magnetic lines of force not coinciding with the lines of longitude
第6题:
after every major hydrographic survey of the area covered by the chart
when there are numerous corrections to be made or the corrections are extensive
when a low-stock situation occurs and minor corrections are made
every two years to update the magnetic variation information
第7题:
magnetic latitudes
magnetic declinations
dip
isogonic lines
第8题:
A rhumb line appears as a straight line
Distance is measured at the midlatitude of the track line
Meridians appear as curved lines converging toward the nearer pole
Parallels,except the equator,appear as curved lines
第9题:
deviation
annual rate of variation change
precession
compass error
第10题:
Magnetic materials of the same polarity repel each other and those of opposite polarity attract
The Earth's magnetic lines of force are parallel to the surface of the Earth
Magnetic meridians connect points of equal magnetic variation
The compass needle(s)will,when properly compensated,lie parallel to the isogonic lines of the Earth
第11题:
isotherm
isallobar
isobar
isotope
第12题:
deviation minus variation
variation plus compass course
combined variation and deviation
difference between true and magnetic heading
第13题:
Isogonic lines are lines on a chart indicating ______.
A.points of equal variation
B.points of zero variation
C.the magnetic latitude
D.magnetic dip
第14题:
Your vessel is proceeding down a channel,and you see a pair of range lights that are in line dead ahead.The chart indicates that the direction of this pair of lights is 229°T,and variation is 6°W.If the heading of your vessel at the time of the sighting is 232°per standard magnetic compass,what is the correct deviation ________.
A.3°E
B.9°E
C.3°W
D.9°W
第15题:
Compass error is equal to the ______.
A.deviation minus variation
B.variation plus compass course
C.combined variation and deviation
D.difference between true and magnetic heading
第16题:
If a magnetic compass is not affected by any magnetic field other than the Earth’s which statement is TRUE?______.
A.Compass error and variation are equal
B.Compass north will be true north
C.Variation will equal deviation
D.There will be no compass error
第17题:
points of equal variation
points of zero variation
the magnetic latitude
magnetic dip
第18题:
Compass error and variation are equal
Compass north will be true north
Variation will equal deviation
There will be no compass error
第19题:
Gray lines on the uppermost inset chart
Red lines on the main body of the chart
In parenthesis on the lines of equal magnetic variation
Annual rate of change is not shown
第20题:
variation
true directions
magnetic directions
annual rate of variation change
第21题:
compass north and magnetic north
compass north and true north
magnetic meridian and the geographic meridian
your vessel's heading and the magnetic meridian
第22题:
An agonic line
The magnetic equator
A magnetic meridian
All of the above
第23题:
Along the magnetic equator
Connected by the isoclinal line
The isopors
The magnetic poles