CÂU HỎI TRẮC NGHIỆM CHUYÊN MÔN CHO SỸ QUAN QUẢN LÝ 1

F1 - MANAGEMENT
1. This occurs when moon is between new and first quarter and between full and third quarter.
High tide occurs between transit of the moon.
A. none of these
B. priming
C. neap tide
D. spring tide
2. It is the interval of time that elapses between two successive transits of a star over the same
meridian and is equal to 23h 56m 04s of mean time.
A. solary day
B. lunar day
C. sidereal day
D. mean solar day
3. Belts of the Earth with strong winds
A. Equatorial belt
B. Westerlies
C. Polar Easterlies
D. Polar low belt
4. Is the angle at the pole measured from 000 to 360 deg westward from the meridian of the star.
A. GHA
B. SHA
C. LHA
D. RA
5. Equation of time is 12 minutes. Find the LAN if the LMT of transit of tabulated at12hrs 12
minutes at latitude 25 degrees North, longitude 124 degrees East.
A. 11h – 56m
B. 12h – 28m
C. 12h – 16m
D. 12h – 00m
6. Long and narrow elevation which sides are steeper than the rise
A. Ridge

B. Trough
C. Trench
D. Rise
7. Following spectra are having longer wavelength, Except:
A. Electric
B. Sound
C. Ultra-violet rays
D. Radio
8. The central meridian for a place with zone description at +3 is
A. 55E
B. 45 W
C. 45E
D. 55W
9. This physical element has most considerable effect in the weather.
A. Water vapour
B. Oxygen
C. Nitrogen
D. None of these
10. It is the angular distance measured westerly from the observer's meridian to the hour circle
passing to the body.
A. intercept
B. GHA
C. SHA

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D. LHA
11. The soft iron spheres used for compensating against the effect of horizontal soft iron in the
ship.

A. Heeling error corrector
B. Quadrantal corrector
C. Permanent magnet corrector
D. Flinder bar
12. The method of which air is induced to rise Except:
A. Turbulence
B. Orographic lifting
C. Advection
D. Convection
13. The sun moves eastward among the stars, causing the star to rise four minutes earlier than
the previous night. This is equivalent to how much hour angle the celestial sphere shifts
westward?
A. 4 degrees
B. 15 degrees
C. 1 degree
D. 6 degrees
14. Convert amplitude West 13.8 degrees North in 360 quadrantal notation
A. 283.8 degrees
B. 256.2 degrees
C. 193.8 degrees
D. 346.2 degrees
15. The standard zone meridian for zone description – 12 is
A. 180 deg
B. 165 deg E
C. 172.5 deg W
D. 172.5 deg W
16. Variation of zone time used on or near with somewhat irregular but defined zone limit.
A. local mean time
B. standard time
C. apparent time

D. all of these
17. The horizontal components of the differential forces are the tide-generating forces. These are
called:
A. balancing forces
B. generating forces
C. tractive forces
D. attractive forces
18. The correction to be applied to ship's time to obtain the corresponding Greenwich meridian
time prefixed by plus (+) sign at Western Longitude and by minus (-) sign at the Eastern
Longitude.
A. Equation of time
B. Zone meridian
C. Longitude in time
D. Zone description
19. The angular distance of a celestial body north or south of the prime vertical.
A. Meridian angle
B. Local hour angle
C. Azimuth angle
D. Amplitude
20. Physical properties of sea water depends from
A. Salinity
B. Pressure
C. All of these
D. Temperature

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21. On or about June 21
A. The southern part of the earth's axis is tilted toward the sun

B. The sun shines equally on both hemisphere, North and South
C. The northern hemisphere having its winter and southern hemisphere its Summer
D. The sun reaches its highest declination north
22. Following spectra are having shorter wave length, Except:
A. ultra-violet rays
B. infra-red
C. cosmic
D. atomic
23. Following are navigational systems, Except:
A. terrestrial navigation
B. sonar navigation system
C. electronic navigation
D. celestial navigation
24. The average rate of decrease of temperature with height, barring little exceptions is:
A. 0.6 deg C per 100 meters
B. 1 deg C per 100 ft
C. 1 deg C per 100 meters
D. 0.6 deg C per 100 ft
25. It is the distance measured on the hour circle from the elevated pole to the body
A. Polar distance
B. SHA
C. Angular distance
D. Declination
26. Light is the spectrum which becomes visible, because of
A. Presence of medium, such as clouds and the like
B. Terrestrial radiation balancing effect
C. Sun's direct radiation
D. Being a visible band spectrum
27. This is a correction to the sextant altitude applied to the visible horizon to obtain the sensible
horizon.

A. Altitude correction
B. Refraction
C. Index error
D. Dip
28. The direction of a line drawn from an observer's assume or DR position towards the
geographic position of the celestial body, when plotting an LOP or line of position is called:
A. intercept
B. bearing
C. azimuth
D. zenithy
29. The shape of the earth is
A. oblong
B. circle
C. ellipse
D. oblate spheroid
30. A minimum distance a vessel, if constrained by not enough sea room, should pass within a
tropical storm is
A. 250 miles
B. 00 miles
C. 50 miles
D. 80 miles
31. The angular distance of a celestial body North or South of the celestial equator measured
along the hour circle of the body is known as tropical storm is
A. amplitude
B. azimuth

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C. zenith

D. declination
32. The time elapsed in a fixed locality between the occurrence of the wave crest and the
occurrence of the next.
A. wave height
B. wave velocity
C. wave period
D. wave length
33. The actual sun appears in the sky.
A. apparent sun
B. none of these
C. elliptical sun
D. mean sun
34. This is the symbol for cumulus cloud.
A. Ci
B. Cu
C. St
D. Cs
35. The LMT of longitude 78 deg 18'W is 04H 03M. Find the GMT
A. 23H 00M
B. 23H 03M
C. 09H 00M
D. 09H 03M
36. Formation of water vapour in free atmosphere takes place by the presence of minute
particles, called
A. gases
B. all of these
C. Nuclei
D. Carbons
37. A long broad depression with greatly sloping sides
A. rise

B. trench
C. trough
D. ridge
38. A snow that is partially melted by the time it reaches the observer
A. Frost
B. Hail
C. Dew
D. Sleet
39. The motion of a body in its orbit around another body
A. Rotation
B. Elongation
C. Revolution
D. Conjunction
40. In the daily pages of the almanac, which of the following is Not found on the right hand
pages
A. GHA of the sun
B. GHA of the moon
C. GHA of the Aries
D. Horizontal parallax of the moon
41. Vertical circle is to the horizon system, what Great Circle is for celestial equator system of
coordinates?
A. Prime vertical
B. Hour circle
C. Principal vertical circle
D. Equinoctial

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42. On the Tropic where the earth deflecting force is very slight, the dominant factor is a force

which contribute to the tendency of the wind to go off at a tangent to the isobars is
A. Corioli's force
B. Centripetal force
C. Frictional resistance force
D. Centrifugal force
43. The narrow belt surrounding the earth roughly midway between the magnetic poles
where the Earth's field is horizontal
A. Magnetic meridian
B. Geographical equator
C. Geographical meridian
D. Magnetic Equator
44. The apparent path of the sun around the earth
A. Ecliptic
B. Equinoctial
C. Hour angle
D. Ellipse
45. This is the result when the rays of light passes from one medium to another to different
density
A. A. Dip
B. Parallax
C. Refraction
D. Index error
46. If an observer is located at latitude 66-32'N on June 21 of any year in the Antarctic circle
will have
A. length of the day equals length of night
B. All night all throughout
C. around the planet
D. all twilight setting at the west
47. A major component of a radar system which amplifies the weak echoes received thus
retaining its distinctive shapes.

A. indicator
B. receiver
C. duplexer
D. transmitter
48. The co-latitude (PZ) is line of the astronomical triangle which is derived from
C A. all of these
B. the earth
C. the horizon
D. The celestial equator system
49. Find the LHA of a star if the GHA of the star is 81 deg 57.3' and the longitude is 174 deg
32.9' West
A. 240 degrees 24.4'
B. 267 degrees 24.4'
C. 256 degrees 30.2'
D. 92 degrees 35.6'
50. Wave which is maintained by a periodic force, and the period of this wave must always
coincide with the period of the force, regardless of the dimensions of the basin of frictional
influence.
A. free wave
B. progressive wave
C. Forced wave
D D. gravity wave
51. Ocean temperature varies with depth and horizontally which maximum temperature is
observed 90 degrees F at
A. Persian Gulf
B. Celebes sea

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C. Mediterranean Sea
D. Red sea
52. This is the amount of dissolved solid material in the water when carbonate has been
converted into oxide, bromide and organic material oxidized.
A. Osmotic pressure
B. Salinity
C. Chloronity
D. Density
53. Find the Great Circle distance from latitude 27 degrees North, longitude 112 degrees East to
latitude 16 degrees 30'North, longitude 045 degrees 56'East
A. 3560 miles
B. 3609 miles
C. 3675 miles
D. 3590 miles
54. The hour of day reckoned by the position of a celestial reference point to relative to a
reference celestial meridian
A. Time
B. True sun
C. Day
D. Mean sun
55. At latitude 19 degrees 33'North, the rising sun was observed to have an amplitude of East 13
degrees 58.2'South. Find the declination of the sun.
A. 18 degrees 29'North
B. 13 degrees 09'South
C. 13 degrees 09'North
D. 18 degrees 29'South
56. The angular distance of the body measured from the Greenwich celestial meridian.
A. Meridian
B. GHA
C. LHA

D. SHA
57. This is a saddle-backed region between two highs and two lows. The wind is light and
variable but does not remain so, for long
A. Trough
B. Ridge
C. none of these
D. Col
58. If the great circle sailing is not checked by the possible increase of the latitude of vertex
without limit, the effect on the track is the risk of sailing through the:
A. equator to the poles
B. equator
C. poles
D. latitude 70 degrees
59. Celestial sphere is ________.
A. the extension of the earth's observer at the equator
B. the sphere seen by an observer at the equator
C. The imaginary sphere of infinite radius with the earth at its center
D. the arc of a great circle through the poles
60. Planets whose orbits are smaller than the earth's and is between the sun and the Earth.
A. Auroras
B. Superior planets
C. Asteroids
D. Inferior planets
61. The chart indicates the variation was 3 degrees 45' East in 1993, the annual change is
increasing 6'. If you use the chart in 2003, how much variation should you apply?
A. 4 degrees 45'West
B. 4 degrees 45'East

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C. 3 degrees 27'East
D. 3 degrees 27'West
62. The navigational system which positioning is derived from terrestrial and natural land
marks.
A. Celestial navigation
B. Electronic navigation
C. Navigational satellite system
D. Terrestrial navigation
63. Hour circle is ________.
A. the arc of the great circle through the poles of the celestial sphere
B. A great circle through the celestial poles and a point or body on the celestial Sphere
C. the path during the celestial body during its daily apparent revolution around the earth
D. the arc of the celestial equator between the upper branch of the local celestial
meridian
64. What is the formula of amplitude?
A. Sine A= sine decl/sin lat
B. Cos A= sine decl x cos lat
C. Sine A= sine decl x sec lat
D. Cos A= sine decl/cos lat
65. The angular distance measured east or west of the local celestial meridian and is numerically
equal to LHA if less than 180 degrees west.
A. Angle of apsides
B. Meridian angle
C. Hour angle
D. Vertical angl
66. If the celestial body is at your meridian, it reaches
A. its highest altitude
B. its highest latitude
C. its highest declination

D. its highest amplitude
67. Term used for tropical cyclone in Caribbean.
A. Willy-willy
B. Cyclone
C. Typhoon
D. Hurricane
68. Definite pattern of weather for a long period of time.
A. Weather
B. Climate
C. All of these
D. Season
69. Great circle on the celestial sphere that passes through the East and West points of the
horizon, passing through the Zenith and Nadir of the celestial horizon.
A. Hour circle
B. Principal vertical circle
C. Vertical circle
D. Prime vertical
70. It is the sextant error if the horizon mirror is not perpendicular to the plane of the Instrument
A. index error
B. parallax errors
C. side error
D. perpendicularity
71. You are in long 175 East and heading 090 where do you change clocks
A. 180
B. 172 – 30 West
C. 172 – 30 East
D. 165 – 30 East
72. This is the result from the differential gravitational forces of the moon and the sun

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A. Tidal current
B. Tide-generating forces
C. Tidal phenomenon
D. Tidal stream
73. It is the angular distance measured westerly from the observer's meridian to the hour circle
passing through the body.
A. LHA
B. Line of position
C. GHA
D. SHA
74. The depression of the visible horizon below the plane of the sensible horizon.
A. Altitude
B. Dip
C. Refraction
D. Parallax
75. It is the sextant error if the horizon mirror is not perpendicular to the plane of the instrument.
A. perpendicularity
B. Side error
C. parallax error
D. index error

76. This falls from cloud usually of layer or stratiform type, whose tops do not reach much
higher, or not as high as, the freezing level
A. Rain
B. Drizzle
C. Snow
D. Frost
77. If the GMT is 1500, the time at longitude 075 East is

A. 1700h
B. 2000h
C. 1000h
D. 1500h
78. Greenwich hour angle of a star (GHA of a star) can be found by
A. GHA of star = GHA of sun – SHA of star
B. GHA of star = GHA of Aries – SHA of star
C. GHA of star = GHA of sun + SHA of star
D. GHA of a star = GHA of Aries + SHA of a star
79. The periodic horizontal movements of the water, during the rise and fall of the tide is called:
A. Tidal currents
B. Stack
C. tidal phenomenon
D. stand
80. All of these are prognostic sign of approaching typhoon Except:
A. Violent winds
B. Short swell
C. Intermittent or heavy rains
D. Halo around the moon
81. The navigational system which positioning is derived from the use of various electronic
equipments.
A. Navigational Satellite system
B. Electronic navigation
C. Doppler Sonar navigation
D. Inertial navigation
82. Find the longitude from the following given GHA of Aries = 252 degrees 17.6' LHA of
Aries = 049 degrees 13.8'

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A. 110 degrees 12.2'
B. 310 degrees 31.4'
C. 156 degrees 56.2'
D. 240 degrees 47.8';
83. This is alternately defined as the line joining places where there is no dip, and for this
reason, it is sometimes called Aclinic Line.
A. None of these
B. Magnetic equator
C. Magnetic meridian
D. Magnetic pole
84. This is the symbol for cirrus cloud
A. Cs
B. St
C. Ci
D. Cu
85. Dumping of dying typhoon
A. trade wind belt
B. doldrums
C. Prevailing westerlies
D. polar low belt
86. Which is LEAST true why there is a "non-constant" rate on the apparent sun as a celestial
reference for time?
A. Motion of the sun along the ecliptic is tilted
B. Revolution of the earth on its orbit is not constant
C. The effect of nutation on the Earth's rotational axis
D. Rotation of the Earth on its axis is not constant
87. It is the sextant error on the index mirror when not perpendicular to the plane of the
instrument.
A. Parallax error

B. Index error
C. Side error
D. Perpendicularity
88. Is a frequently shift resulting from relative motion between a transmitter and receiver or
reflector of acoustic or electromagnetic energy.
A. Doppler
B. Echo
C. Acceleration
D. Acceleration
89. Ocean average depth is
A. none of these
B. 2, 075 feet
C. 2, 075 meter
D. 2, 075 fathom
90. You are in long 175West and heading 270 where do you change clocks
A. 172 – 30 East
B. 165 – 30 East
C. 172 – 30 West
D. 180
91. Type of tidal occurrence which is characterized by a larger inequality in the high water
heights or in both. Here are usually two high and low water each day, but occasionally the tide
may become diurnal.
A. None of these
B. Diurnal
C. Semi-diurnal
D. Mixed type
92. The possible effect of one precessional cycle upon the global weather pattern and its climate
is to interchange the pattern to the opposite, every ________.

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A. 26, 000 years
B. 25, 800 years
C. 2, 000 years
D. 14, 000 years
93. When the temperature decreases or the density of the atmosphere increases, the propagated
waves are bended upward causing the decrease of radar horizon.
A. None of these
B. All of these
C. Sub- Refraction
D. Super-refraction
94. It is the sextant error when the horizon and the index mirror are not parallel.
A. side error
B. index error
C. parallax errors
D. perpendicularity
95. Fog at sea is also called
A. radiation fog
B. convection fog
C. frost smoke
D. advection fog
96. Meridian angle is
A. the angular distance east or west of the local meridian, through 180 deg
B. the angular distance measured westward from the Greenwich meridian, through 360 deg
C. the angular distance measured westward from the vernal equinox, through 360 deg
D. the angular distance west of the local celestial meridian, through 360 deg
97. Factors affecting visibility
A. ice pellets
B. all of these

C. water droplets
D. haze fog
98. The point which the Great Circle track reaches its highest latitude
A. rhumb course
B. vertex
C. rhumbline
D. vortex
99. If the latitude is 47 degrees North and the declination is 18 degrees South, the amplitude of
the body when setting is
A. West 27 degrees South
B. West 27 degrees North
C. South 27 degrees East
D. East 27 degrees South
100. The rate of temperature decreases with height, commonly noticed at troposphere is called
A. None of these
B. Adiabatic changes
C. Lapse rate
D. Inversion rate
101. Gnomonic projection is based on __________.
A. Plane tangent at one point
B. Cylinder tangent at the equator
C. Cone tangent at selected parallels
D. Cone tangent at one parallel
102. In a marine sextant, when the index arm is set to zero and the reflected image and the actual
horizon is not in one continuous line, the error is ___________.
A. Graduation error
B. No error
C. Prismatic error
D. Collimation error

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103. The navigation satellite orbits the earth in ___________.
A. 14 hours
B. 45 minutes
C. 106 minutes
D. 8 hours
104. The clockwise change of wind direction in a cyclone is termed ____________.
A. Backing
B. Veering
C. Shifting
D. Altering
105. The counterclockwise change of wind direction in a frontal depression is called
__________.
A. Backing
B. Veering
C. Altering
D. Shifting
106. In order to have its North-South axis maintain its position in line with meridian, the gyro
must be capable of ________.
A. Gyroscopic inertia
B. Precession
C. Rigidity
D. None of these
107. The property of the gyroscope by which it tends to maintain its axis or plane of spin is
termed as:
A. Gyroscopic inertia
B. Precession
C. Rigidity

D. Torque
108. Compass bearings of terrestrial or celestial bodies are observed by means of the instrument
called __________.
A. Index mirror
B. Azimuth mirror
C. Horizon glass
D. Sextant
109. In a chart, the lines linking places with the same amount of variation is called
____________.
A. Isoclinic lines
B. Isogonic line
C. Variation line
D. Any of these
110. The horizontal angle between the directions the True north and Magnetic north at any place
is called ___________.
A. Variation
B. Deviation
C. Compass error
D. Total error
111. The path which a typhoon has already passed is called the ___________.
A. Wake
B. Track
C. Path
D. Front
112. The projected line of direction that a revolving tropical cyclone will pass is termed as:
A. Wake
B. Path
C. Track
D. Front
113. The troposphere and stratosphere is bounded by the ___________.

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A. Tropopause
B. Stratopause
C. Convergence zone
D. Atmosphere
114. A practical means of estimating the wind force from the appearance of the sea is called the:
A. Synoptic chart
B. Beaufort scale
C. Weather forecast
D. Weather chart
115. Force 7 on the Beaufort Scale which is termed as near gale has a wind speed of
____________.
A. 17-21 knots
B. 22-27 knots
C. 28-33 knots
D. 34-40 knots
116. A gale, or Force 8 on the Beaufort Scale has a wind speed of _____________.
A. 28-33 knots
B. 34-40 knots
C. 41-47 knots
D. 48-55 knots
117. Wind Speed of 63 knots and above in the Beaufort Scale indicates ____________.
A. Strong gale
B. Storm
C. Violent storm
D. Hurricane
118. The point of recurvature which is the Western-most point on the tropical cyclone's track is

called the _____________.
A. Vertex
B. Vortex
C. Typhoon path
D. Wake
119. What publication can you get complete information about any port of the world?
A. Sailing directon
B. Coast pilot
C. Guide to Port entry
D. Chart catalouge
120. The standard time meridian for zone description -1 is ___________.
A. 0°
B. 7 1/2° West
C. 7 1/2° East
D. 15° East
121. Which statement is True concerning equatorial tides?
A. They occur when the Sun is at minimum declination north or south.
B. They occur when the Moon is at maximum declination north or south.
C. The difference in height between consecutive high or low tides is at a minimum.
D. They are used as the basis for the vulgar establishment of the port.
122. An alternating light ____________.
A. shows a light with varying lengths of the lighted period
B. shows a light that changes color
C. marks an alternate lesser-used channel
D. is used as a replacement for another light
123. The winds you would expect to encounter in the North Atlantic between latitudes 5° and
30° are known as the _______.
A. doldrums
B. westerlies
C. trades

D. easterlies

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124. An important lunar cycle affecting the tidal cycle is called the nodal period. How long is
this cycle?
A. 16 days
B. 18 days
C. 6 years
D. 19 years
125. The West Wind Drift is located ___________.
A. near 60° S
B. on each side of the Equatorial Current
C. in the North Atlantic between Greenland and Europe
D. in the South Pacific near 5° S
126. A sextant having an index error that is "on the arc" has a ___________.
A. positive correction
B. dip error
C. negative correction
D. semidiameter error
127. The prevailing winds in the band of latitude from approximately 5° North to 30° North are
the:
A. prevailing westerlies
B. northeast trade winds
C. southeast trade winds
D. doldrums
128. At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your
position and it is 0.5 mile east of your DR. Which statement is True?
A. The current is westerly at 0.5 knot.

B. You must increase speed to compensate for the current.
C. The current cannot be determined.
D. The drift is 0.25 knot
129. The class of tide that prevails in the greatest number of important harbors on the Atlantic
Coast is ____________.
A. interval
B. mixed
C. diurnal
D. semidiurnal
130. When the equation of time is taken from the Nautical Almanac for use in celestial
navigation, it is used to determine _____.
A. zone time
B. sunrise
C. time of local apparent noon
D. local mean time
131. When the equation of time is taken from the Nautical Almanac for use in celestial
navigation, it is used to determine _____.
A. doldrums
B. horse latitudes
C. trade winds
D. prevailing westerlies
132. Neap tides occur when the _____________.
A. Moon is in its first quarter and third quarter phases
B. Sun and Moon are on opposite sides of the Earth
C. Moon's declination is maximum and opposite to that of the Sun
D. Sun and Moon are in conjunction
133. Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read
11h 59m 59s. Today at the 1200 GMT time tick the chronometer read 00h 00m 01s. What is the
chronometer error?
A. Gaining 2 seconds

B. Losing 2 seconds
C. Fast 2 seconds

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D. Fast 1 second
134. The consistent winds blowing from the horse latitudes to the doldrums are called the:
A. prevailing westerlies
B. polar easterlies
C. trade winds
D. roaring forties
135. Neap tides occur ____________.
A. at the start of spring, when the Sun is nearly over the equator
B. only when the Sun and Moon are on the same sides of the Earth and are nearly in line
C. when the Sun and Moon are at approximately 90° to each other, as seen from the
Earth
D. when the Sun, Moon, and Earth are nearly in line, regardless of alignment order
136. Weather system in the middle latitutdes generally travel from ________________?
A. west to east
B. east to west
C. north to south
D. none of the above
th
137. On March 17, at 0500 zone time, you cross the 180 meridian steaming eastward to west
longitude. What is your local time?
A. You are in -12 time zone.
B. It is 1700, March 18.
C. It is 0500, March 16.
D. It is 0500, March 18.

138. Spring tides occur ___________.
A. at the start of spring, when the Sun is nearly over the equator
B. only when the Sun and Moon are on the same side of the Earth and nearly in line
C. when the Sun and Moon are at approximately 90° to each other as seen from the Earth
D. when the Sun, Moon, and Earth are nearly in line, in any order
139. Which of the four adjustable errors in the sextant is the principle cause of index error?
A. Telescope not being parallel to the frame
B. Index mirror and horizon glass not being parallel
C. Index mirror not being perpendicular to the frame
D. Horizon glass not being perpendicular to the frame
140. It is 1200 local time for an observer at 54° East longitude. Which statement is True?
A. It is afternoon at Greenwich.
B. It is midnight at 126° East longitude.
C. The observer is in time zone -4.
D. All of the above are true.
141. Which of the four adjustable errors in the sextant causes side error?
A. Horizon glass not being perpendicular to the frame
B. Index mirror not being perpendicular to the frame
C. Telescope not being parallel to the frame
D. Elliptical centering error
142. The marine sextant is subject to seven different types of errors, four of which may be
corrected by the navigator. An error Not correctable by the navigator is ___________.
A. index error
B. prismatic error
C. perpendicularity of the horizon glass
D. perpendicularity of the index mirror
143. On the pole side of the trade wind belt, there is an area of high pressure with weak pressure
gradients and light, variable winds. This area is called the ____________.
A. prevailing westerlies
B. geostrophic winds

C. doldrums
D. horse latitudes
144. When using a radar in a unstabilized mode, fixes are determined most easily from:

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145.

146.

147.

148.

149.
the:

A. center bearings
B. tangent bearings
C. ranges
D. objects that are close aboard
The difference (measured in degrees) between the GHA of the body and the longitude of
the observer is the ____________.
A. right ascension
B. meridian angle
C. SHA of the observer
D. zenith distance
Steady precipitation is typical of _________________.
A. coming cold weather conditions

B. a warm front weather condition
C. high pressure conditions
D. scattered cumulus clouds
In order to remove index error from a sextant, you should adjust the _________________.
A. index mirror to make it parallel to the horizon glass with the index set at zero
B. horizon glass to make it parallel to the index mirror with the index set at zero
C. horizon glass to make it parallel to the sextant frame
D. telescope to make it perpendicular to the sextant frame
Which of these sextant errors is nonadjustable?
A. Prismatic error
B. Graduation error
C. Centering error
D. All of the above
Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate

A. distance to the next port
B. speed of the vessel over the ground or through the water
C. time of the next navigational satellite pass
D. None of the above
150. What is the longitude of the geographical position of a body whose Greenwich hour angle
is 210°30'?
A. 30°30' East
B. 59°30' West
C. 120°30' West
D. 149°30' East
151. You are steaming west in the North Atlantic in an extra tropical cyclonic storm, and the
wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies to the :
A. north
B. south
C. east

D. west
152. The direction of prevailing winds in the Northern hemisphere is caused by the:
A. magnetic field at the North Pole
B. Gulf Stream
C. Earth's rotation
D. Arctic cold fronts
153. To predict the actual depth of water using the Tide Tables, the number obtained from the
Tide Tables is ___________.
A. the actual depth
B. added to or subtracted from the charted depth
C. multiplied by the charted depth
D. divided by the charted depth
154. If your weather bulletin shows the center of a low pressure area to be 100 miles due east of
your position, what winds can you expect in the Northern Hemisphere?
A. East to northeast

15


B. East to southeast
C. North to northwest
D. South to southeast
155. If the Sun's observed altitude is 47°50', the zenith distance is ____________.
A. 42°10'
B. 42°50'
C. 47°50'
D. 132°10'
156. Which would you consult for information about the general current circulation in the North
Atlantic Ocean?
A. Pilot chart

B. Coast Pilot
C. Current Table
D. Climatological Atlas
157. The difference of latitude (dlat) between the geographic position (GP) of a celestial body
and your position, at the time of upper transit, is represented by ____________.
A. co latitude
B. co distance
C zenith distance
D. altitude
158. The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest
wind of a few hours ago has shifted to the west. This is an indication that you are located in the
____________.
A. navigable semicircle
B. dangerous semicircle
C. low pressure area
D. eye of the storm
159. If the Sun's observed altitude is 27°12', the zenith distance is ___________.
A. 62°48'
B. 27°12'
C. 152°48'
D. 43°12'
160. The southeast trade winds actually blow toward the ____________.
A. southeast
B. south
C. east
D. northwest
161. If a weather bulletin shows the center of a low pressure system to be 100 miles due east of
you, what winds can you expect in the Southern Hemisphere?
A. South-southwesterly
B. North-northwesterly

C. South-southeasterly
D. North-northeasterly
162. The usual sequence of directions in which a tropical cyclone moves in the Southern
Hemisphere is:
A. northwest, west, and south
B. southwest, south, and southeast
C. north, northwest, and east
D. west, northwest, and north
163. Tropical cyclones normally form within which of the following belts of latitude?
A. 5° to 15°
B. 15° to 30°
C. 30° to 45°
D. 45° to 60°
164. Coral atolls, or a chain of islands at right angles to the radar beam, may show as a long line
rather than as individual targets due to ____________.

16


A. the effects of beam width
B. limitations on range resolution
C. the pulse length of the radar
D. the multiple-target resolution factor
165. You are anchored in the Aleutian Island chain and receive word that a tsunami is expected
to strike the islands in six hours. What is the safest action?
A. Get underway and be in deep, open-ocean water when the tsunami arrives.
B. Increase the scope of the anchor cable and drop the second anchor underfoot at short
stay.
C. Get underway and be close inshore on the side of the island away from the tsunami.
D. Plant both anchors with about a 60° angle between them, and let out a long scope to

each anchor.
166. A semi diameter correction is applied to observations of _____________.
A. Mars
B. the Moon
C. Jupiter
D. All of the above
167. What is an advantage of the magnetic compass aboard
vessels?
A. Compass error is negligible at or near the earth's magnetic poles.
B. It does not have to be checked as often.
C. It is reliable due to it's essential simplicity.
D. All points on the compass rose are readily visible.
168. The error in the measurement of the altitude of a celestial body, caused by refraction,
increases as the _______________.
A. horizontal parallax decreases
B. observer's height above sea level increases
C. humidity of the atmosphere decreases
D. altitude of the body decreases
169. 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
170. What instrument measures wind velocity?
A. Hydrometer
B. Barometer
C. Psychrometer
D. Anemometer
171. A hurricane moving northeast out of the Gulf passes west of your position. You could
expect all of the following Except ____________.

A. higher than normal swells
B. high winds
C. winds veering from south, through west, to northwest
D. light showers
172. A The modified civilian system that approaches military precision in global positioning is
called ___________.
A. DGPS
B. CGPS
C. PGPS
D. GPS
173. A radar display in which North is always at the top of the screen is a(n) _____________.
A. unstabilized display
B. stabilized display
C. composition display
D. relative display

17


174. In some river mouths and estuaries the incoming high tide wave crest overtakes the
preceding low-tide trough. This results in a wall of water proceeding upstream, and is called
A. seiche
B. bore
C. boundary wave
D. surge
175. You are using a radar in which your own ship is shown at the center, and the heading flash
always points to 0°. If bearings are measured in relation to the flash, what type of bearings
are produced?
A. Relative
B. True

C. Compass
D. Magnetic
176. You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching.
If the wind veers steadily, this indicates that your vessel is _________.
A. in the dangerous semicircle
B. in the navigable semicircle
C. directly in the path of the storm
D. in the storm center
177. The arc of a great circle which passes through the body and celestial poles is part of the:
A. hour circle
B. diurnal circle
C. observer's meridian
D. altitude circle
178. You are attempting to locate your position relative to a hurricane in the Northern
Hemisphere. If the wind direction remains steady, but with diminishing velocity, you are most
likely:
A. in the right semicircle
B. in the left semicircle on
C. the storm track ahead of the center
D. on the storm track behind the center
179. In a tropical cyclone in the Southern Hemisphere, a vessel hove to with the wind shifting
clockwise would be ______________.
A. ahead of the storm center
B. in the dangerous semicircle
C. directly behind the storm center
D. in the navigable semicircle
180. Low pressure disturbances, which travel along the intertropical convergence zone, are
called :
A. permanent waves
B. tidal waves

C. tropical waves
D. tropical storms
181. The radar control used to reduce sea return at close ranges is the ______________.
A. gain control
B. sensitivity time control
C. fast time constant
D. pulse length control
182. Magnetic compass deviation _____________.
A. varies depending upon the bearing used
B. is the angular difference between magnetic north and compass north
C. is published on the compass rose on most nautical charts
D. is the angular difference between geographic and magnetic meridians
183. What is the approximate wave length of an X Band Radar operating on a frequency of
approximately 9500 MHz?
A. 3 cm
B. 10 cm

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C. 30 cm
D. 100 cm
184. Your radar indicates a target; however, there is no visible object at the point indicated. A
large mountain, approximately 50 miles away on the same bearing as the target, is breaking
the horizon. You should suspect the radar target is caused by _______.
A. a submerged submarine
B. ducting
C. sub-refraction
D. ionospheric skip waves
185. What indicates that a tropical cyclone can be expected at your position within 24 to 48

hours?
A. A daily fluctuation of over 6 millibars in the barometric reading
B. A sudden wind shift from southwest to northwest followed by steadily increasing
winds
C. The normal swell pattern becoming confused, with the length of the swell increasing
D. An overcast sky with steadily increasing rain from nimbostratus clouds
186. What kind of weather would you expect to accompany the passage of a tropical wave?
A. Heavy rain and cloudiness
B. Good weather
C. A tropical storm
D. Dense fog
187. You have another ship overtaking you close aboard to starboard. You have 3 radar targets
bearing 090° relative at ranges of .5 mile, 1 mile, and 1.5 miles. In this case, the unwanted
echoes are called ______________.
A. multiple echoes
B. spoking
C. indirect echoes
D. side-lobe echoes
188. What will cause the Arpa to emit a visual alarm, audible alarm, or both?
A. An acquired target entering into a guard zone
B. A tracked target lost for one radar scan
C. A tracked target entering your preset CPA-TCPA limits
D. A target being initially detected within a guard zone
189. Your Arpa has been tracking a target and has generated the targets course and speed. The
radar did not receive a target echo on its last two scans due to the weather. What should
you expect under these circumstances?
A. The ARPA will generate data as if the target was still being tracked by radar.
B. The ARPA will give an audible and/or visual lost target alarm.
C. The ARPA will generate data based on sea return echoes from the vicinity where the
target was

D. The ARPA has lost all "memory" of the target and must recompute the target data.
190. What classification of tropical cyclone would have closed isobars, counter clockwise rotary
circulation, and sustained winds between 34 and 63 knots?
A. A tropical disturbance
B. A tropical depression
C. A tropical storm
D. A hurricane
191. You have been observing your radar screen and notice that a contact on the screen has
remained in the same position, relative to you, for several minutes. Your vessel is making
10 knots through the water. Which statement is True?
A. The contact is dead in the water
B. The contact is on the same course and speed as your vessel
C. The contact is on a reciprocal course at the same speed as your vessel
D. The radar is showing false echoes and is probably defective
192. Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating
a faster speed than the speed over the ground. What should you expect under these
circumstances?

19


A. The generated CPA will be less than the actual CPA
B. The generated TCPA will be later than the actual TCPA
C. The range of initial target acquisition will be less than normal
D. The targets true course vector will be in error
193. Monsoons are characterized by _____________.
A. light, variable winds with little or no humidity
B. strong, gusty winds that blow from the same general direction all year
C. steady winds that reverse direction semiannually
D. strong, cyclonic winds that change direction to conform to the passage of an extreme

low pressure system
194. You are underway at 10 knots. At 1800 you note a radar contact dead ahead at a range of
10 miles. At 1812 the contact is dead ahead at a range of 8 miles. The estimated speed of
the contact is ____________.
A. dead in the water
B. 5 knots
C. 10 knots
D. 15 knots
195. Which ARPA data should you use in order to determine if a close quarters situation will
develop with a target vessel?
A. Set and drift of the current
B. Relative track information
C. Initial range of acquisition
D. Initial range of acquisition
196. You are underway at 5 knots and see on your radar a contact 10 miles directly astern of
you. 12 minutes later, the contact is 8 miles directly astern of you. What is the estimated
speed of the contact?
A. Dead in the water
B. 1 knot
C. 10 knots
D. 15 knots
197. A radar contact will remain stationary on a relative motion radar display only when it is:
A. on the same course as your vessel
B. at the same speed as your vessel
C. on the same course and speed as your vessel
D. on a reciprocal course at the same speed as your vessel
198. In mid-ocean, the characteristics of a wave are determined by three factors. What is NOT
one of these factors?
A. Effect of the moon's gravity
B. Fetch

C. Wind velocity
D. Length of time a wind has been blowing
199. Your ARPA has two guard zones. What is the purpose of the inner guard zone?
A. Alert the watch officer that a vessel is approaching the preset CPA limit
B. Warn of small targets that are initially detected closer than the outer guard zone
C. Guard against target loss during critical maneuvering situations
D. Sound an alarm for targets first detected within the zone
200. The set of the current is the ______________.
A. speed of the current at a particular time
B. maximum speed of the current
C. direction from which the current flows
D. direction to which the current flows
201. What is the First sign of the existence of a well developed tropical cyclone?
A. Gale force winds from the north
B. An unusual long ocean swell
C. Steep, short-period waves and light wind

20


D. Thunderstorms and higher than usual humidity
202. You depart Latitude 18°54' North, Longitude 73°00' East, and steam 1150 miles on course
253° T What are the latitude and longitude of your arrival by Mercator sailing?
A. Latitude13°16' North, Longitude 55°18' East
B. Latitude 13°18' North, Longitude54°03' East
C. Latitude 13°19' North, Longitude 53°46' East
D. Latitude 13°20' North, Longitude53°28' East
203. Standard atmospheric pressure in inches of mercury is ________.
A. 30
B. 28.92

C. 29.92
D. 29
204. A vessel steams 1082 miles on course 047° T from Latitude 37°18.0' North, Longitude
24°40.0' West. What is the latitude and longitude of the point of arrival By Mercator sailing?
A. Latitude 49°30.0' North, Longitude06°22.0' West
B. Latitude49°33.0' North, Longitude06°25.0' West
C. Latitude 49°36.0' North, Longitude 06°28.0' West
D. Latitude 49°39.0' North, Longitude 06°31.0' West
205. Which statement concerning GPS is TRUE?
A. It cannot be used in all parts of the world
B. There are 12 functioning GPS satellites at present
C. It may be suspended without warning
D. Two position lines are used to give a 2D fix
206. A sea breeze is a wind ___________.
A. that blows towards the sea at night
B. that blows towards an island during the day
C. caused by cols air descending a coastal incline
D. caused by the distant approach of a hurricane
207. Determine the great circle distance and initial course from Latitude 08°36.0' North,
Longitude 126°17.0' East to Latitude 02°12.0' South, Longitude 81°53.0' West.
A. 9015 miles, 067° T
B. 9076 miles, 067° T
C. 9105 miles, 079° T
D. 9076 miles, 079° T
208. You are plotting a running fix in an area where there is a determinable current. How should
this current be treated in determining the position?
A. The course and speed made good should be determined and used to advance the
LOP
B. The drift should be added to the ship's speed
C. The current should be ignored

D. The set should be applied to the second bearing
209. Determine the great circle distance and initial course from Latitude 27°51.0'N,
Longitude71°41.0'W to Latitude 49°45.0'N, Longitude 06°14.0'W.
A. 3196 miles, 313.1°T
B. 3214 miles, 046.9°T
C. 3219 miles, 042.5°T
D. 3231 miles, 041.4°T
210. The closest point of approach (CPA) of a contct on a relative motion radar may be
determined ______________?
A. immediately when the contact is noted in the radar
B. only if the radar scope is watched constantly
C. after the contact has been marked at least twice
D. by an occasional glance at the radar.
211. Which position includes the effects of wind and current?
A. Dead reckoning position
B. Leeway position
C. Set position
21


D. Estimated position
212. Determine the great circle distance and initial course from Latitude 35°17.6' North,
Longitude 144°23.0' East to Latitude 47°36.0' North, Longitude 124°22.0' West.
A. 3946 miles, 312° T
B. 3931 miles, 048° T
C. 3881 miles, 042° T
D. 3718 miles, 318° T
213. In the Northern Hemisphere, the largest waves or swells created by a typhoon or hurricane
will be located ________.
A. in the southeast quadrant of the storm

B. directly behind the storm center
C. forward and to the right of its course
D. behind and to the left of its course
214. What describes an ebb current?
A. Horizontal movement of the water away from the land following low tide
B. Horizontal movement of the water toward the land following low tide
C. Horizontal movement of the water away from the land following high tide
D. Horizontal movement of the water toward the land following high tide
215. The great circle distance from Latitude 35°57.2' North, Longitude 05°45.7' West to
Latitude 24°25.3' North, Longitude 83°02.6' West is 3966.5 miles and the initial course is
283.7° T. The latitude of the vertex is 38°09.4' North. What is the longitude of the vertex?
A. 28°02.6' West
B. 28°18.2' West
C. 28°46.3' West
D. 28°54.7' West
216. The great circle distance from Latitude 08°50.0' North, Longitude 80°21.0' West to
Latitude 22°36.0' North, Longitude 128°16.0' East is 7801 miles and the initial course is 324°44'
T. The latitude of the vertex is 56°52.7' North. What is the longitude of the vertex?
A. 156°43' West
B. 157°29' West
C. 159°32.3' West
D. 161°18.2' West
217. Most GPS receivers use the Doppler shift of the carrier phase to compute ________.
A. Latitude
B. Longitude
C. Speed
D. Time
218. On a working copy of a weather map, a cold front is represented by what color line?
A. Red
B. Blue

C. Alternating red and blue
D. Purple
219. Deviation in a compass is caused by the ________.
A. vessel's geographic position
B. vessel's heading
C. earth's magnetic field
D. influence of the magnetic materials of the vessel
220. At 0000 you fix position and plot a new DR track line. At 0200 you again fix your position
and it is 0.5 mile west of your DR. Which statement is True?
A. The set is 090°, drift 0.5 knot
B. The set is 270°,drift 0.25 knot
C. The set is 270°, drift 0.5 knot
D. The set is 270°, drift 1.0 knot
221. The great circle distance from Latitude 35°08.0' South, Longitude19°26.0' East to Latitude
33°16.0' South, Longitude 115°36.0' East is 4559 miles and the initial course is 121° T.
Determine the latitude of the vertex.
A. 44°29.1' South
22


B. 45°30.9' South
C. 46°18.2' South
D. 43°41.8' South
222. The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of
the:
A. wind circulation and forward motion of the storm
B. extension of the low pressure ridge
C. recurvature effect
D. direction of circulation and pressure gradient
223. Variation is not constant; it is different with every change in ________.

A. speed
B. vessel heading
C. geographical location
D. cargo
224. An amplitude of the Sun in high latitudes _________.
A. is most accurate before sunrise
B. is most accurate after sunset
C. is most accurate after sunset
D. is most accurate when the Sun's center is observed on the visible horizon
225. You depart Latitude 26°03' South, Longitude 10°28' East, for Latitude 26°03' South,
Longitude 01°16' West. What are the course and distance by parallel sailing?
A. 090° T, 547.2 miles
B. 090° T, 632.5 miles
C. 270° T, 547.2 miles
D. 270° T, 632.5 miles
226. The greater the pressure difference between a high and low pressure center, the;
A. dryer the air mass will be
B. cooler the temperature will be
C. greater the force of the wind will be
D. warmer the temperature will be
227. You depart Latitude 52°01' North, Longitude 176°09' East, for Latitude 52°01' North,
Longitude 178°46' West. What are the course and distance by parallel sailing?
A. 090° T, 95 miles
B. 090° T, 188 miles
C. 270° T, 95 miles
D. 270° T, 188 miles
228. 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 inter cardinal heading have less than 1° error
229. Ocean swells originating from a typhoon can move ahead of it at speeds near:
A. 10 knots
B. 20 knots
C. 30 knots
D. 50 knots
230. Determine the distance from Latitude 59°12' North, Longitude 14°00' West to Latitude
59°12' North, Longitude 03°20' West by parallel sailing?
A. 324.2 miles
B. 325.4 miles
C. 327.7 miles
D. 328.9 miles
231. The highest frequency of tropical cyclones in the North Atlantic Ocean occurs during:
A. January, February and March
B. April, May and June
C. August, September and October
D. July, November and December
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232. The Brazil Current flows in which general direction?
A. Northwesterly
B. Southwesterly
C. Southerly
D. Northerly
233. A cloud marked vertical development (often anvil shaped) would be classified as:
A. cirrus
B. cirrocumulus
C. altocumulus
D. cumulonimbus

234. You are on a voyage from Limoy, Costa Rica, to Los Angeles, CA. The distance from
departure to arrival is 3150 miles. The speed of advance is 14.0 knots. You estimate 24.0 hours
for bunkering at Colon, and 12.0 hours for the Panama Canal transit. If you take departure at
1836 hours (ZD +6), 28 January, what is your ETA (ZD +8) at Los Angeles?
A. 1736, 9 February
B. 1736, 8 February
C. 1336, 8 February
D. 0536, 8 February
235. You have steamed 803 miles at 13 knots, and consumed 179 tons of fuel. If you have 371
tons of usable fuel remaining, how far can you steam at 16 knots?
A. 1099 miles
B. 1374 miles
C. 1833 miles
D. 581 miles
236. On a voyage from Halifax, N.S., to Dakar, West Africa, the Canary Current will:
A. set the vessel to the left
B. set the vessel to the right
C. offer resistance in the form of a head current
D. furnish additional thrust in the form of a fair or following current
237. When is the peak of the hurricane season in the western North Pacific?
A. January through March
B. April through June
C. July through October
D. November through December
238. The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be
accompanied by which of the following conditions?
A. Rain and poor visibility
B. Dropping barometric pressure and backing wind in the Northern Hemisphere
C. High winds and rising sea
D. Severe thunderstorms

239. You have steamed 925 miles at 13.5 knots, and consumed 181 tons of fuel. If you have 259
tons of usable fuel remaining, how far can you steam at 16 knots?
A. 795 miles
B. 942 miles
C. 1117 miles
D. 1409 miles
240. You have steamed 746 miles at 14.0 knots, and consumed 152 tons of fuel. If you have 201
tons of usable fuel remaining, how far can you steam at 10 knots?
A. 1381 miles
B. 1934 miles
C. 2263 miles
D. 2707 miles
241. Which condition exists at the summer solstice in the Northern Hemisphere?
A. The North polar regions are in continual darkness
B. The Northern Hemisphere is having short days and long nights
C. The Southern Hemisphere is having winter
D. The Sun shines equally on both hemispheres

24


242. The flow of air around an anticyclone in the Southern Hemispheres is _________.
A. clockwise and outward
B. counterclockwise and outward
C. clockwise and inward
D. counterclockwise and inward
243. Your ship is proceeding on course 320 T at a speed of 25 knots. The apparent wind is from
30 deg off the starboard bow, speed 32 knots. What is the relative direction, true direction and
speed of the true wind?
A. Relative 80,, true 040, T, 16.2 knots

B. Relative 40,, true 080, T, 16.4 knots
C. Relative 80,, true 060, T, 15.2 knots
D. Relative 60,, true 040, T, 18.6 knots
244. Anticyclones are usually characterized by ____________.
A. dry, fair weather
B. high winds and cloudiness
C. gustiness and continuous precipitation
D. overcast skies
245. Which ocean current is "warm" based on the latitude in which it originates and on the effect
it has on climate?
A. Kuroshio Current
B. Benguela Current
C. Peru Current
D. California Current
246. You have steamed 607 miles at 17.0 knots, and consumed 121 tons of fuel. If you have 479
tons of usable fuel remaining, how far can you steam at 14.5 knots?
A. 1211 miles
B. 1748 miles
C. 2817 miles
D. 3303 miles
247. Tropical storms and hurricanes are most likely to form in the Southern hemisphere during:
A. January through March
B. April through May
C. June through August
D. September through November
248. You have steamed 1134 miles at 10 knots, and consumed 121 tons of fuel. If you have
steam 1522 miles to complete the voyage, how many tons of fuel will be consumed while
steaming at 12 knots?
A. 146 tons
B. 189 tons

C. 200 tons
D. 234 tons
249. Cold water flowing southward through the western part of the Bering Strait between Alaska
and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the:
A. Alaska Current
B. arctic Current
C. Kuroshio Current
D. Oyashio Current
250. The most accurate position by radar fix is _______.
A. range and visual bearing
B. radar cross bearings
C. radar range and radar bearing
D. two radar ranges
251. Your vessel arrives in port with sufficient fuel to steam 726 miles at 16 knots. If you are
unable to take on bunkers, at what speed must you proceed to reach your next port, 873 miles
distant?
A. 14.6 knots
B. 15.1 knots

25