1、单选题：
Attention is called to the fact that in many cases pipelines are not ______ and charted depths may be decreased by up to 2 meters.
选项：
A:B. buried
B:C. existed
C:A. concealed
D:D. built
答案: 【B. buried】

2、单选题：
Depths of {wk.} are to be inserted in the chart.
选项：
A:C. wake
B:A. work
C:B. wreck
D:D. weak
答案: 【B. wreck】

3、单选题：
For full information regarding the current circulation of the Indian Ocean, ______ Sailing Direction, Current Atlas, etc.
选项：
A:B. look for
B:D. regard
C:C. see
D:A. watch
答案: 【C. see】

4、单选题：
In Admiralty Sailing Directions, STRIPES is the word used to indicate ______ marking.
选项：
A:C. diagonal
B:D. vertical or diagonal
C:A. horizontal
D:B. vertical
答案: 【D. vertical or diagonal】

5、单选题：
In the Uniform Cardinal System of Buoyage, a buoy in the eastern quadrant from a danger could ______.
选项：
A:B. be black and white vertically striped
B:D. be any of the above
C:C. have a black top mark
D:A. be black and white horizontally striped
答案: 【C. have a black top mark】

6、单选题：
The lateral system is used in ____.
选项：
A:A. restricted waters such as shoals, reefs or wrecks
B:D. open water such as buoyed channels
C:C. open waters such as shoals, reefs or wrecks
D:B. restricted waters such as buoyed channels
答案: 【B. restricted waters such as buoyed channels】

7、单选题：
What would be the color of an IALA starboard hand lateral buoy, as seen when sailing toward land, in Europe?
选项：
A:C. Red and green stripes
B:D. Black and yellow stripes
C:B. Red
D:A. Green
答案: 【A. Green】

8、单选题：
When reversing, the tidal stream will have a period with little or no effect. This is call the_____.
选项：
A:A. rise
B:C. slack
C:B. range
D:D. spring
答案: 【C. slack】

9、单选题：
The average time between two high waters is 12 hours and 25 minutes because this is the time it takes for ______.
选项：
A:A. The sun to be at the opposite side of the moon
B:D. The sun and the moon to be on the same side
C:C. The moon to be at its apogee
D:B. The moon to be at the opposite side of the earth
答案: 【B. The moon to be at the opposite side of the earth】

10、单选题：
What is the tidal height?
选项：
A:A. Twice the tide amplitude
B:B. The range of the tide
C:D. The height above or under the Mean Level
D:C. The water above the Lowest Astronomical Tide
答案: 【C. The water above the Lowest Astronomical Tide】

11、单选题：
Data relating to the direction and velocity of rotary tidal currents can be found in the ______
选项：
A:D. Tide Table
B:B. Tidal Current Tables
C:C. Nautical Almanac
D:A. Mariners Guide
答案: 【B. Tidal Current Tables】

12、单选题：
From ______ the mariner can know the data of tide.
选项：
A:D. the port list
B:B. the cargo plan
C:C. the tide table
D:A. the sea pilot
答案: 【C. the tide table】

13、单选题：
Which is a weekly publication advising mariners of important matters affecting navigational Safety ?
选项：
A:D. Sailing Directions
B:B. Notice to Mariners
C:A. Light List
D:C. Coast Pilot
答案: 【B. Notice to Mariners】

14、单选题：
In which source could you find the number of a chart for a certain geographic area?
选项：
A:B. Catalog of Charts
B:A. Chart No.1
C:C. IMO Practical Navigator
D:D. IMO Light List
答案: 【B. Catalog of Charts】

15、单选题：
All of the following information concerning lighted aids to navigation may be read directly from the light list except the ______
选项：
A:C. luminous range
B:D. light characteristics
C:B. height of light above water
D:A. location
答案: 【C. luminous range】

16、单选题：
The arrangement of charts in the catalogue is _________.
选项：
A:B. on a national basis
B:C. shown orderly
C:D. appeared from A to W
D:A. on a regional basis
答案: 【A. on a regional basis】

17、单选题：
The datum from which the predicted heights of tides are reckoned in the tide table is _____.
选项：
A:B. the same as that used for the charts of the locality
B:C. the highest possible level
C:A. mean low water
D:D. given in table three of the tide tables
答案: 【B. the same as that used for the charts of the locality】

18、单选题：
Many of the soundings shown on the chart are derived from ______ , Undue reliance should not be placed upon them.
选项：
A:D. adequate and present surveys
B:A. complete and often very poor surveys
C:B. correct and often very good surveys
D:C. inadequate and often very old surveys
答案: 【C. inadequate and often very old surveys】

19、单选题：
Lines on a chart which connect points of equal magnetic variation are called ______.
选项：
A:A. magnetic latitudes
B:C. dip
C:B. magnetic declinations
D:D. isogonic lines
答案: 【D. isogonic lines】

20、单选题：
How is the annual rate of change for magnetic variation shown on a pilot chart?
选项：
A:D. Annual rate of change is not shown
B:A. Gray lines on the uppermost inset chart
C:B. Red lines on the main body of the chart
D:C. In parenthesis on the lines of equal magnetic variation
答案: 【A. Gray lines on the uppermost inset chart】