第八节 地文航海.doc

地文航海
1、______ is a defined area within which ships must use particular caution and should follow the recommended direction of traffic flow．
A．Recommended Direction of Traffic Flow
B．Roundabout
C．Separation Zone or Line
D．Precautionary Area
2、______ is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone．
A．Traffic Lane B．Roundabout
C．Inshore Traffic Zone D．Two-way Route
3、______ is not likely to be a methods of Traffic Separation．
A．Separation of opposing streams of traffic by separation zones or lines
B．The separation of through traffic from local traffic by provision of inshore traffic zones
C．Division of traffic from several different direction into sectors
D．Control of routing traffic through shipping routes
4、______ means the curve on the earth's surface which cuts all the meridians at the same angle．
A．Great Circle B．Position Line
C．Rhumb line D．True Bearing
5、A buoy having red and green horizontal bands would have a light characteristic of ______．
A．Interrupted quick flashing B．Composite group flashing
C．Morse（A） D．Quick flashing
6、A buoy marking a wreck will show a（n）______．
A．White light FL（2）and a topmark of 2 black spheres
B．Occulting green light and may be lettered
C．Yellow light and will be numbered
D．Continuous quick white light and may be numbered
7、A celestial body will cross the prime vertical circle when the latitude is numerically ______．
A．Greater than the declination and both are of the same name
B．Less than the declination and both are of the same name
C．Greater than the declination and both are of contrary name
D．Less than the declination and both are of contrary name
8、A fairly accurate estimation of a ship's position can be calculated by a technique known as ______．
A．Dead reckoning B．Pilotage
C．Great circle sailing D．Geographic navigation
9、A line of position derived by radar range from an identified point on a coast will be a（n）______．
A．Straight line B．Arc
C．Parabola D．Line parallel to the coast
10、A position obtained by applying only your vessel's course and speed to a known position is a ______．
A．Dead-reckoning position B．Fix
C．Probable position D．Running fix
11、A position that is obtained by applying estimated current and wind to your vessel's course and speed is a（n）______．
A．Dead reckoning position B．Estimated position
C．Fix D．None of the above
12、A special purpose buoy shall be ______．
A．lighted with a white light B．striped black and red
C．lighted with a red light D．yellow
13、An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol ________．
A．Open-faced diamond B．Diamond with a cross
C．Circle D．Square
14、An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol ________．
A．Open-faced diamond B．Diamond with a cross
C．Circle D．Rectangle
15、At the magnetic equator there is no induced magnetism in the vertical soft iron because ______．
A．The lines of force cross the equator on a 0°-180°alignment
B．The quadrantal error is 0°
C．There is no vertical component of the Earth's magnetic field
D．The intercardinal headings have less than 1° error
16、Depiction of TSS's on charts uses ______ as the primary color．
A．magenta B．deep red
C．bright red D．red
17、Deviation changes with a change in ______．
A．Latitude B．Heading
C．Longitude D．Sea conditions
18、How would you pass a red buoy in the maritime buoyage system“A” ________．
A．keep the buoy on the vessel's starboard side when approaching a port and on the vessel's port side when leaving
B．keep the buoy on the vessel's port side when approaching a port and on the vessel's starboard side when leaving
C．keep the buoy on the vessel's starboard side when approaching and leaving
D．keep the buoy on the vessel's port side when approaching and leaving
19、In very high latitudes，the most practical chart projection is the ______．
A．Mercator B．Gnomonic
C．Azimuthal D．Lambert conformal
20、On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector．The red sector ______．
A．Indicates the limits of the navigable channel
B．Indicates a danger area
C．Is used to identify the characteristics of the light
D．Serves no significant purpose
21、Restricted areas at locks and dams are indicated by ______．
A．Flashing red lights upstream and fixed red lights downstream
B．Yellow unlighted buoys
C．Signs and/or flashing red lights
D．Red daymarks upstream and green daymarks downstream
22、The direction a vessel is pointed at any given time is the ______．
A．Course B．Track
C．Heading D．Course over the ground
23、The direction in which a vessel is steered is the course．The path actually followed is the ______．
A．Route B．Track
C．Heading D．Course over the ground
24、The Earth has the shape of a（n）______．
A．Sphere B．Oblate spheroid
C．Spheroid of revolution D．Oblate eggoid
25、The equator is ______．
A．the primary great circle of the Earth perpendicular to the axis
B．the line to which all celestial observations are reduced
C．the line from which a celestial body's altitude is measured
D．All of the above
26、The four standard light colors used for lighted aids to navigation are red，green，white，and ______．
A．purple B．orange
C．blue D．yellow
27、The luminous range of a light takes into account the ______．
A．glare from background lighting
B．existing visibility conditions
C．elevation of the light
D．observer's height of eye
28、The points on the earth's surface where the magnetic dip is 90° are ______．
A．Along the magnetic equator B．Connected by the isoclinal line
C．The isopors D．The magnetic poles
29、The positions and characteristics of lights and buoys shown within the port area are ______．
A．Untrue B．Impossible
C．Suspectful D．Unimportant
30、The recording fathometer produces a graphic record of the ______．
A．bottom contour only up to depths of 100 fathoms
B．depth underneath the keel against a time base
C．contour of the bottom against a distance base
D．depth of water against a distance base
31、The shortest distance between any two points on earth defines a ______．
A．Small circle B．Great circle
C．Rhumb line D．Hyperbola
32、The symbol which appears beside a light on a chart reads“Gp Fl R（2）10 sec 160 ft 19M”．Which characteristic does the light possess ________．
A．It is visible two nautical miles
B．Its distinguishing number is“19M”
C．It has a red light
D．It flashes once every ten seconds
33、The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the ______．
A．Set B．Frequency
C．Period D．Function
34、There is sufficient anchorage for ______ at all time around the No、1 buoy and for smaller vessels around the No、4 buoy．
A．Deep laded vessels B．Deeply load vessels
C．Deep loading vessels D．Deeply loaded vessels
35、Traffic separation schemes adopted by the IMO are listed in ______．
A．NM B．Ship's Routing
C．Colreg D．Solas
36、Under the IALA-A Buoyage System，a green spar buoy with a triangular topmark would indicate that the buoy ______．
A．Should be left to port when heading out to sea
B．May be left close aboard on either side
C．Is on the north side of a point of interest
D．Is marking the preferred channel
37、What area of the earth cannot be shown on a standard Mercator chart ________．
A．Equator
B．Areas including both North and South latitudes
C．North and South Poles
D．A narrow band along the central meridian
38、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
39、What describes a flood current ________．
A．Horizontal movement of the water toward the land after high tide
B．Horizontal movement of the water toward the land after low tide
C．Horizontal movement of the water away from the land following high tide
D．Horizontal movement of the water away from the land following low tide
40、What describes an accurate position that is NOT based on any prior position ________．
A．Dead-reckoning position B．Estimated position
C．Fix D．Running fix
41、What is a lighted safe water mark fitted with to aid in its identification ________．
A．A spherical topmark
B．Red and white retroreflective material
C．A sequential number
D．A red and white octagon
42、What is an ebb current ________．
A．A current at minimum flow
B．A current coming in
C．A current going out
D．A current at maximum flow
43、What is the major advantage of high altitude observations ________．
A．Errors due to unusual parallax are eliminated
B．The same body can be used for a fix from observations separated by several minutes
C．The declination is the only information needed from the almanac
D．The semidiameter correction of the sextant altitude is eliminated
44、When a buoy marks a channel bifurcation，the preferred channel is NOT indicated by ______．
A．The shape of an unlighted buoy
B．The light color of a lighted buoy
C．The color of the topmost band
D．Whether the number is odd or even
45、When entering a channel from seaward，the numbers on buoys ______．
A．Are the same as their Light List number
B．Are marked in 6 inch figures with retroreflective material
C．Increase with the even numbers to starboard
D．Decrease with the odd numbers to starboard
46、When entering from seaward，a buoy displaying a single-flashing red light would indicate ______．
A．A junction with the preferred channel to the left
B．A sharp turn in the channel to the right
C．The starboard side of the channel
D．A wreck to be left on the vessel's port side
47、When latitude and longitude are used，these shall be expressed in ______（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich．
A．Fathoms and meters
B．Miles and kilometers
C．Arc and degrees
D．Degrees and minutes
48、When navigating a vessel，you ______．
A．Can always rely on a buoy to be on station
B．Can always rely on a buoy to show proper light characteristics
C．Should assume a wreck buoy is directly over the wreck
D．Should never rely on a floating aid to maintain its exact position
49、When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation ________．
A．The objects lie in a straight line
B．The vessel is inside of a triangle formed by the objects
C．The vessel is outside of a triangle formed by the objects
D．A circle will pass through your position and the three objects
50、Which buoy will NOT display white retro reflective material ________．
A．Safe water mark
B．Isolated danger mark
C．Preferred channel mark
D．Daymark of no lateral significance
51、Which of the following are data layer categories to be displayed on ECDIS ________．
A．ECDIS warnings and messages
B．Hydrographic Office data
C．Notice to Mariners information
D．All of the above
52、Which position includes the effects of wind and current ________．
A．Dead reckoning position
B．Leeway position
C．Estimated position
D．Set position
53、Which statement concerning current is TRUE ________．
A．Current can be determined by measuring the direction and distance between simultaneous EP and DR positions
B．The drift of the current should be averaged out on a one hour basis
C．After the current is determined，it should not be used for further plotting because it is an unknown variable
D．The distance between a simultaneous DR position and fix is equal to the drift of the current
54、You determine your vessel's position by taking a range and bearing to a buoy．Your position will be plotted as a（n）______．
A．Running fix
B．Fix
C．Dead-reckoning position
D．Estimated position
55、You have been informed that dredging operations may be underway in your vicinity．Which buoy indicates the dredging area ________．
A．White buoy with a green top
B．White and international orange buoy
C．Yellow buoy
D．Yellow and black vertically-striped buoy
56、You should plot your dead reckoning position ______．
A．From every fix or running fix
B．From every estimated position
C．Every three minutes in pilotage waters
D．Only in pilotage waters

6