航海英语新题库(上海)

一、海图及海图作业50题

[251]To agree with larger scale chart，latitudes taken from this chart should be increased ______ about 8 seconds．

A. with

B. in

C. by

D. to

[252]On this chart only the principle ______ to navigation are shown．A.equipment's B.tools C.apparatus D.aids

[253]Many of the soundings shown on the chart are derived from

_____.Undue reliance should not be placed upon them．

A. complete and often very poor surveys

B. correct and often very good surveys

C. inadequate and often very old surveys

D. adequate and present surveys

[254]Lines on a chart which connect points of equal magnetic variation are called ______.

A. magnetic latitudes

B. magnetic declinations

C. dip

D. isogonic lines

[255]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

[256]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

[257]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.

[258]Charted depth is the ______.

A.vertical distance from the chart sounding datum to the ocean bottom，plus the height of tide

B.vertical distance from the chart sounding datum to the ocean bottom

C.average height of water over a specified period of time

D.average height of all low waters at a place

[259]Chart correction information is NOT disseminated through the

______.

A. Summary of Corrections

B. Local Notice to Mariners

C. Daily Memorandum

D. Chart Correction Card

[260]All straight lines represent great circle tracks on a chart based on a(n) ______.

A. Mercator projection

B. polyconic projection

C. orthographic projection

D. gnomonic projection

[261]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 [262]A Mercator chart is a ______.

A. cylindrical projection

B. simple conic projection

C. polyconic projection

D. rectangular projection

[263]______ chart 3994，positions read from this chart should be shifted 0．03 minutes Northward．

A. To consider

B. To check

C. To examine

D. To agree with

[264]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

[265]______ is a term denoting the determination of a ship's position by observations of Celestial or terrestrial objects，or by a combination of both．

A. Course-planning

B. Position-fixing

C. Radar-plotting

D. Stowage-plan making

[266]A chart position enclosed by a semi-circle is a(n)

A. fix

B. estimated position

C. dead reckoning position

D. running fix

[267]A true bearing of a charted object，when plotted on a chart，will establish a ______.

A. fix

B. line of position

C. relative bearing

D. range

[268]Admiralty Charts are published in ______.

A. U．S．A

B. China

C. U．K

D. Japan

[269]Attention is ______ the advice on the use of charts in The Mariner's Handbook Chapter 3，Section 1．A. fixed to B. needed for

C. pushed to

D. drawn to

[270]Distance along a track line is measured on a Mercator chart by using the ______.

A. latitude scale near the middle of the track line

B. longitude scale near the middle of the track line

C. latitude scale at the midlatitude of the chart

D. latitude or longitude scale at the middle of the scale

[271]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

[272]Magnetic information on a chart may be ______.

A. found in the center(s) of the compass rose(s)

B. indicated by isogonic lines

C. found in a note on the chart

D. All of the above

[273]My position has been obtained ______ astronomical observation．A. with B. from C. on D. by

[274]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

[275]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

[276]Solid green arrows on the main body of a pilot chart indicate

______.

A. prevailing wind directions

B. prevailing ocean current directions

C. probable surface current flow

D. shortest great circle routes

[277]The agonic line on an isomagnetic chart indicates the ______.

A. magnetic equator

B. magnetic longitude reference line

C. points where there is no variation

D. points where there is no annual change in variation

[278]The buoy symbol printed on your chart is leaning to the northeast. This indicates ______.

A. you should stay to the north or east of the buoy

B. you should stay to the west or south of the buoy

C. the buoy is a major lighted buoy

D. nothing special for navigational purposes

[279]The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected when trying to land a boat on this beach?

A.Surging

B.Spilling

C.Plunging

D.Converging

[280]The chart symbol indicating that the bottom is coral is ______. A. C B. Cl C. Co D. c

[281]The charts sold are of ______.

A. newly edition with up to date correction and in reasonable prices．

B. the current edition and incorporate the last Notices to Mariners correction

C. the current edition and incorporate the latest Notices to Mariners correction at the time of sale．

D. brand-new one with up to date correction and clean writing [282]The compass rose on a nautical chart indicates both variation and ______.

A. deviation

B. annual rate of variation change

C. precession

D. compass error

[283]The description Racon beside an illustration on a chart would mean a ______.

A.radar conspicuous beacon

B.circular radiobeacon

C.radar transponder beacon

D.radar calibration beacon

[284]The maximum difference between mean time and apparent time is ______.

A. equal to the longitude expressed in time units

B. about 16 minutes

C. the difference between the GHA of mean sun and the first point of Aries

D. 15°of arc

[285]The numeral in the center of a wind rose circle on a pilot chart indicates the ______.