航海英语海图及海图作业章节练习(2019.04.25)

单项选择题
In which source could you find the number of a chart for a certain geographic area?（）
A.Chart No.1
B.Catalog of Charts
C.IMO Practical Navigator
D.IMO Light List
单项选择题
The compass rose on a nautical chart indicates both variation and （）.
A.deviation
B.annual rate of variation change
C.precession
D.compass error
单项选择题
Navigational charts are （） frequent changes，the important one of which are promulgated by Admiralty Notices to Mariners．
A.published with
B.combined with
C.in connection with
D.subject to
单项选择题
Entering from sea，a daymark on the port side of the channel would be indicated on a chart by a （）.
A.red triangle with the letter R
B.white triangle with the letters RG
C.green square with the letter G
D.white square with the letters GR
单项选择题
What is NOT an advantage of the rhumb line track over a great circle track? （）
A.Easily plotted on a Mercator chart
B.Negligible increase in distance on east-west courses near the equator
C.Does not require constant course changes
D.Plots as a straight line on Lambert conformal charts
单项选择题
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
单项选择题
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
A.In the Coast Pilot
B.In the Nautical Almanac
C.In the List of Lights
D.In the Sailing Directions
单项选择题
Charts showing the coast of Mexico are produced by the United States（）.
A.National Geospatial-Intelligence Agency
B.Coast Guard
C.Naval Observatory
D.National Ocean Service
单项选择题
A chart position enclosed by a square is a（n）（）.
A.fix
B.estimated position
C.dead reckoning position
D.running fix
单项选择题
A revised print of a chart is made （）.
A.after every major hydrographic survey of the area covered by the chart
B.when there are numerous corrections to be made or the corrections are extensive
C.when a low-stock situation occurs and minor corrections are made
D.every two years to update the magnetic variation information