航海英语海图及海图作业章节练习(2018.02.14)

单项选择题
On the south and the east coasts of Block Island are circles with a dot in the center and labeled CUP. This is a （）.
A.conspicuous object
B.steep depression in the surrounding hills that resembles a cup
C.domed structure useful for navigation
D.calling-up-point used for traffic control
单项选择题
The changes in the channel’s sands and buoys on this coast are （） this chart can not be considered as a safe guide of the channel．
A.frequent
B.so frequent
C.frequent that
D.so frequent that
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
单项选择题
My position has been obtained （） astronomical observation．
A.with
B.from
C.on
D.by
单项选择题
What defines a great circle? （）
A.A curved line drawn on a Mercator Chart
B.A course line that inscribes a loxodromic curve
C.The shortest distance between any two points on the earth
D.The smallest circle that can be drawn on the face of a sphere
单项选择题
Chart correction information is NOT disseminated through the （）.
A.Summary of Corrections
B.Local Notice to Mariners
C.Daily Memorandum
D.Chart Correction Card
单项选择题
On a Mercator chart，1 nautical mile is equal to（）.
A.1 minute of longitude
B.1 degree of longitude
C.1 minute of latitude
D.1 degree of latitude
单项选择题
Which chart symbol indicates the bottom is clay（）.
A.Cly
B.Cla
C.Cl
D.C
单项选择题
The short-long dashed magenta line around Gardiners Island marks（）.
A.A regulated anchorage
B.Fish trap areas
C.An area closed to the public
D.Underwater cables
单项选择题
A chart projection depicting the poles and a small area on either side of a connecting meridian，that is sometimes used for star charts，is the（）.
A.Azimuthal gnomonic projection
B.Lambert conformal projection
C.Transverse Mercator projection
D.Polyconic projection