Assessment Test


1. A section of the river that is narrower than usual and is often navigable from bank to bank is a __________.


2. A semidiameter correction is applied to observations of __________.


3. A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) __________.


4. A sextant having an index error that is "off the arc" has a __________.


5. A sextant having an index error that is "on the arc" has a __________.


6. A sidereal day is approximately how much shorter than a solar day?


7. A sidereal day is shorter than a solar day. This difference is due to __________.


8. A sign of thunderstorm development is a cumulus cloud __________.


9. A single barometric pressure reading of 28.60 indicates __________.


10. A single line of position combined with a dead-reckoning position results in a(n) __________.


11. A single vertical magnet placed underneath the compass in the binnacle is used to compensate for __________.


12. A sling psychrometer is a(n) __________.


13. A sling psychrometer is used to measure __________.


14. A slow rise in the barometric pressure forecasts __________.


15. A slow, gradual fall of the barometer indicates approaching __________.


16. A special daymark is a __________.


17. A special mark (yellow buoy), if lighted, may exhibit which light rhythm?


18. A special purpose buoy shall be __________.


19. A spherical buoy may be __________.


20. A star is observed at lower transit. The line of position derived from this sight is __________.


21. A star that suddenly becomes several magnitudes brighter and then gradually fades is a __________.


22. A steep barometric gradient indicates __________.


23. A storm's track is characterized by all of the following except __________.


24. A strong, often violent, northerly wind occurring on the Pacific coast of Mexico, particularly during the colder months, is called __________.


25. A structure, usually made of stone, or cement pilings, which extends from the bank at approximately right angles to the current is called a __________.


26. A swift current occurring in a narrow passage connecting two large bodies of water, which is produced by the continuously changing difference in height of tide at the two ends of the passage, is called a __________.


27. A sylphon cell is a part of a __________.


28. A system of reservoirs and connecting tubes in a gyro compass is called a __________.


29. A thin, whitish, high cloud popularly known as "mares' tails" is __________.


30. A tide is called diurnal when __________.


31. A time diagram is a diagram of the celestial sphere as observed from above the __________.


32. A time diagram is a diagram on the plane of the __________.


33. A tow that is properly aligned to pass through a narrow opening between two bridge piers is "__________".


34. A towboat is pushing barges ahead at a dangerously fast speed when __________.


35. A triangular daymark would be colored __________.


36. A tropical storm is a tropical cyclone that generates winds of __________.


37. A tropical wave is usually preceded by __________.


38. A true bearing of a charted object, when plotted on a chart, will establish a __________.


39. A tsunami is caused by a(n) __________.


40. A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as __________.


41. A variable star is one that __________.


42. A vertex of the navigational triangle is NOT located at the __________.


43. A vertically-striped buoy may be __________.


44. A very light breeze that causes ripples on a small area of still water is a __________.


45. A vessel crossing a river on the Western Rivers, must keep out of the way of a power-driven vessel __________.


46. A vessel entering the eye of a hurricane should expect __________.


47. A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right of way?


48. A vessel is steaming in east longitude on January 25 and crosses the International Date Line on an eastbound course at 0900 zone time. What is the date and time at Greenwich when the vessel crosses the line?


49. A vessel operating on the Great Lakes, and whose position is southeast of an eastward-moving storm center, would NOT experience __________.


50. A vessel sighting a northern right whale dead ahead should __________.


51. A warm air mass is characterized by __________.


52. A weather forecast states that the wind will commence backing. In the Northern Hemisphere, this would indicate that it will __________.


53. A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will __________.


54. A weather front exists when __________.


55. A white buoy with a blue band is __________.


56. A white buoy with an open-faced orange diamond on it indicates __________.


57. A white buoy with an orange circle marked on it indicates __________.


58. A white buoy with an orange cross within a diamond marked on it indicates __________.


59. A white buoy with an orange rectangle on it is used to indicate __________.


60. A white diamond daymark with an orange border is a(n) __________.


61. A wind vane on a moving vessel shows __________.


62. Above-normal tides near the center of a hurricane may be caused by the __________.


63. According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northeast wind the center of low pressure is located to the __________.


64. A microbarograph is a precision instrument that provides a __________.


65. A mid-channel buoy, if lighted, will show a __________.


66. A millibar is a unit of __________.


67. A mooring buoy, if lighted, shows which color light?


68. A nautical mile is a distance of approximately how much greater than or less than a statute mile?


69. A NAVAREA warning carries the following number; 1986/87 (11). Which statement is TRUE?


70. A navigator fixing a vessel's position by radar __________.


71. A nun buoy will __________.


72. A parallax correction is NOT applied to observations of the __________.


73. A parallel of latitude other than the equator is a __________.


74. A phase correction is applied to observations of __________.


75. A phase correction may be applicable to correct the sextant altitude correction of __________.


76. A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.


77. A pilot chart does NOT contain information about __________.


78. A plane perpendicular to the polar axis will never form what line on the Earth's surface?


79. A plane that cuts the Earth's surface and passes through the poles will always form __________.


80. A plane that cuts the Earth's surface at any angle and passes through the center will always form __________.


81. A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.


82. A position obtained by taking lines of position from one object at different times and advancing them to a common time is a(n) __________.


83. A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.


84. A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.


85. A power-driven vessel operating in a narrow channel with a following current, on the Western Rivers, is meeting an upbound vessel. Which statement is TRUE?


86. A preferred-channel buoy may be __________.


87. A preferred-channel buoy will show a __________.


88. A psychrometer has two thermometers that provide dry bulb and wet bulb temperatures. By comparing these two temperature readings with a set of tables you can determine the __________.


89. A radar contact will remain stationary on a relative motion radar display only when it is __________.


90. A radar display which is oriented, so that north is always at the top of the screen, is called a(n) __________.


91. A radar range to a small, charted object such as a light will provide a line of position in which form?


92. A rapid rise or fall of the barometer indicates __________.


93. A red triangular daymark marks __________.


94. A relative bearing is always measured from __________.


95. A revised print of a chart is made __________.


96. A rock and sand structure extending from the bank of the river toward the channel is known as a __________.


97. A safe water daymark has what shape?


98. A safe water mark may be __________.


99. A sailing chart could have a scale of __________.


100. A sea breeze is a wind __________.


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