Assessment Test

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1. The radar control that shortens all echoes on the display and reduces clutter caused by rain or snow is the __________.


2. The radar control used to reduce sea return at close ranges is the __________.


3. The radius of a circle of equal altitude for a body equals the body's __________.


4. The radius of a circle of equal altitude of a body is equal to the __________.


5. The range of tide is the __________.


6. The recording fathometer produces a graphic record of the __________.


7. The reference datum used in determining the heights of land features on most charts is __________.


8. The region containing 3/4 of the mass of the atmosphere and the region to which are confined such phenomena as clouds, storms, precipitation and changing weather conditions is called __________.


9. The region of high pressure extending around the Earth at about 35°N latitude is called the __________.


10. The revision date of a chart is printed on which area of the chart?


11. The rise and fall of the ocean's surface due to a distant storm is known as __________.


12. The safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone is to __________.


13. The Sailing Directions (Enroute) contain information on __________.


14. The Sailing Directions (Enroute) contain information on all of the following EXCEPT __________.


15. The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________.


16. Sailing Directions are published in the Enroute format and the __________.


17. The Sailing Directions contain information on __________.


18. The scale on a chart is given as 1:5,000,000. This means that __________.


19. The set of the current is the __________.


20. The set of the equatorial countercurrent is generally to the __________.


21. The shoreline on charts generally represents the mean __________.


22. The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean __________.


23. The short text messaging feature of the automatic identification system (AIS) allows for messages of up to __________.


24. The shortest distance between any two points on earth defines a __________.


25. The sidereal day begins __________.


26. The sidereal day begins when the __________.


27. The signal from a ramark will show on the PPI as a __________.


28. The slope of a warm front is about __________.


29. The small circle of the celestial sphere parallel to the celestial equator, and transcribed by the daily motion of the body, is called the __________.


30. The southeast trade winds actually blow toward the __________.


31. The speed at which an ocean wave system advances is called __________.


32. The speed of an ocean current is dependent on __________.


33. The speed of sound in water is approximately __________.


34. The speed of sound through ocean water is nearly always __________.


35. The spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyroscope become north seeking so that it can be used as a compass?


36. The spinning motion of a planet around its axis is called __________.


37. The spinning of a celestial body about its axis is known as __________.


38. The standard atmospheric pressure in millibars is __________.


39. The standard atmospheric pressure measured in inches of mercury is __________.


40. The standard magnetic compass heading differs from the true heading by __________.


41. The star lists in the Nautical Almanac are based on which of the following magnitudes?


42. The steady current circling the globe at about 60°S is the __________.


43. The steepness of a cold front depends on __________.


44. The strongest winds and heaviest rains in a hurricane are found in the __________.


45. The summer solstice is the point where the Sun is at __________.


46. The Sun at a maximum declination north would be approximately at __________.


47. The Sun is closest to the Earth in what month?


48. The Sun's center is coincident with the principal vertical circle when __________.


49. The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.


50. The survey information upon which a chart is based is found __________.


51. 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?


52. The temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur is referred to as the __________.


53. The term "flood current" refers to that time when the water __________.


54. The term "Western Rivers," when it refers to regulations requiring towing vessels to carry navigational-safety equipment, charts or maps, and publications, includes the __________.


55. The tides in Boston Harbor generally __________.


56. The time interval between successive wave crests is called the __________.


57. The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the __________.


58. The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as __________.


59. The tropical year differs from which year by 20 minutes


60. The two most effective generating forces of surface ocean currents are __________.


61. The type of current which will have the greatest effect on the course made good for your vessel is __________.


62. The type of fog that occurs on clear nights with very light breezes and forms when the earth cools rapidly by radiation is known as __________.


63. The typical operating range of automatic identification systems (AIS) at sea is nominally __________.


64. The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is __________.


65. The value of sixty nautical miles per degree of geodetic latitude is most correct at __________.


66. The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the __________.


67. The velocity of a rotary tidal current will be decreased when the Moon is __________.


68. The velocity of a rotary tidal current will increase when the Moon is __________.


69. The velocity of the apparent wind can be less than the true wind and from the same direction, if certain conditions are present. One condition is that the __________.


70. The velocity of the current in large coastal harbors is __________.


71. The velocity of the wind, its steady direction, and the amount of time it has blown determines a wind driven current's __________.


72. The vertical angle between the horizontal and the magnetic line of force is the __________.


73. The vertical component of the Earth's magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation?


74. The vertical distance from the tidal datum to the level of the water is the __________.


75. The visible range marked on charts for lights is the __________.


76. The white lights in a vertical line on a multiple-span bridge indicate __________.


77. The wind circulation around a high pressure center in the Northern Hemisphere is __________.


78. The wind direction around a low pressure area in the Northern Hemisphere is __________.


79. The wind flow from the horse latitudes to the doldrums is deflected due to __________.


80. The wind speed and direction observed from a moving vessel is known as __________.


81. The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.


82. The winds of the "roaring forties" are strongest near __________.


83. The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the __________.


84. The winter solstice is the point where the Sun is at __________.


85. The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U.S. coasts?


86. The zenith is the point on the celestial sphere that is __________.


87. There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?


88. Three or four feet of the total height of a storm surge in a hurricane can be attributed to __________.


89. Time signals broadcast by WWV and WWVH are transmitted __________.


90. To avoid error you should read the scale of an aneroid barometer with your eye placed __________.


91. To find a magnetic compass course from a true course you must apply __________.


92. To find the specific phase characteristic of a lighthouse on a sound of the United States you would use the __________.


93. To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at which time in relation to the predicted time of the favorable current?


94. To predict the actual depth of water using the Tide Tables, the number obtained from the Tide Tables is __________.


95. Tropic tides are caused by the __________.


96. Tropical cyclones are classified by form and intensity. Which system does not have closed isobars


97. Tropical cyclones do not form within 5° of the Equator because __________.


98. The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.


99. The quadrantal spheres are used to __________.


100. The radar control that reduces weak echoes out to a limited distance from the ship is the __________.


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