B. a decrease in wind velocity
C. a change in the present weather conditions D. that fog will soon set in KEY: C
[247]A red triangular daymark marks ______. A. the centerline of a navigable channel B. the starboard side of a channel
C. a prominent object of navigational interest that has no lateral significance D. an area of a channel where passing another vessel is permitted KEY: B
[248]A report of casualty to a mobile offshore drilling unit must be made in writing to which office? A. Commandant of the Coast Guard B. Owner of the unit
C. Nearest Coast Guard Marine Safety Office D. Captain of the nearest port KEY: C
[249]A report of casualty to a mobile offshore drilling unit must include ______. A. the estimated cost of damage to the unit B. an evaluation of who was at fault C. the amount of ballast on board
D. the name of the owner or agent of the unit KEY: D
[250]A rigid replica of the International Code flag \ A. pulling a submarine cable B. engaged in diving operations
C. engaged in underway replenishment D. transferring explosives KEY: B
02.4 海图及海图作业
[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 KEY: C
[252]On this chart only the principle ______ to navigation are shown． A. equipment's B. tools
C. apparatus D. aids KEY: D
[253]Many of the soundings shown on the chart are derived from ______.Undue reliance should not be placed upon them．
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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 KEY: C
[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 KEY: D
[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 KEY: A
[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 KEY: B
[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. KEY: A
[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 KEY: B
[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 KEY: D
[260]All straight lines represent great circle tracks on a chart based on a(n) ______. A. Mercator projection B. polyconic projection C. orthographic projection
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D. gnomonic projection KEY: D
[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 KEY: C
[262]A Mercator chart is a ______. A. cylindrical projection B. simple conic projection C. polyconic projection D. rectangular projection KEY: A
[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 KEY: D
[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 KEY: D
[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 KEY: B
[266]A chart position enclosed by a semi-circle is a(n) ______. A. fix
B. estimated position
C. dead reckoning position D. running fix KEY: C
[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
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KEY: B
[268]Admiralty Charts are published in ______. A. U．S．A B. China C. U．K D. Japan KEY: C
[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 KEY: D
[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 KEY: A
[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 KEY: C
[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 KEY: D
[273]My position has been obtained ______ astronomical observation． A. with B. from C. on D. by KEY: D
[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
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KEY: D
[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 KEY: C
[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 KEY: B
[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 KEY: C
[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 KEY: D
[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 KEY: B
[280]The chart symbol indicating that the bottom is coral is ______. A. C B. Cl C. Co D. c KEY: 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 KEY: C
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