Advanced Navigation Final Practice

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Advanced Navigation Final Practice - Quiz


Questions and Answers
  • 1. 

    Which of the following flight instruments are designed to operate in conjunction with ground-based radio frequency nav aids?

    • A.

      GPS

    • B.

      Magnetic Compass

    • C.

      VOR

    • D.

      Flux-gate Compass

    Correct Answer
    C. VOR
    Explanation
    VOR (VHF Omnidirectional Range) is a ground-based radio frequency navigation aid that provides pilots with directional information. It works by transmitting signals in all directions, and aircraft instruments receive and interpret these signals to determine the aircraft's bearing from the VOR station. Therefore, VOR is specifically designed to operate in conjunction with ground-based radio frequency nav aids. GPS, on the other hand, is a satellite-based navigation system that does not rely on ground-based radio frequency signals. Magnetic compass and flux-gate compass are independent instruments that do not require ground-based radio frequency nav aids for operation.

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  • 2. 

    With respect to the magnetic compass, deviation is defined as:

    • A.

      The difference between true course and magnetic course

    • B.

      Error introduced by magnetic fields local to the instrument

    • C.

      Error introduced because of very high latitudes

    • D.

      Compass tendency to "lead" turns in a southerly heading

    Correct Answer
    B. Error introduced by magnetic fields local to the instrument
    Explanation
    Deviation in a magnetic compass refers to the error caused by magnetic fields that are present in the immediate vicinity of the compass. These magnetic fields can be generated by nearby metallic objects or electrical equipment, and they can cause the compass needle to deviate from its true north position. Therefore, the correct answer states that deviation is the error introduced by magnetic fields local to the instrument.

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  • 3. 

    Course lines derived from an aeronautical chart through the use of a plotter yield what type of direction?

    • A.

      True

    • B.

      Magnetic

    • C.

      Mercator

    • D.

      Great circle

    Correct Answer
    A. True
    Explanation
    The correct answer is "true". In this context, "true" refers to true north, which is the direction towards the North Pole. Course lines derived from an aeronautical chart using a plotter are aligned with true north. This is important for navigation purposes, as it provides an accurate reference point for pilots to follow their intended flight path. Magnetic north, on the other hand, is the direction towards the Earth's magnetic north pole and can vary from true north due to magnetic declination. Mercator and Great circle are not relevant to the type of direction yielded by course lines on an aeronautical chart.

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  • 4. 

    On a chart with a scale of 1:500,000 approximately how many nautical miles are represented by 3 inches

    • A.

      10

    • B.

      23.7

    • C.

      16

    • D.

      20.5

    Correct Answer
    D. 20.5
    Explanation
    On a chart with a scale of 1:500,000, the ratio indicates that for every 1 unit on the chart, there are 500,000 units in reality. Since the question asks for the representation of 3 inches on the chart, we can calculate the number of nautical miles by multiplying 3 inches by the scale ratio of 1:500,000. This gives us 3 inches * 500,000 nautical miles/inch = 1,500,000 nautical miles. Therefore, the correct answer is 20.5.

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  • 5. 

    An isogonic line with a value of 20(degrees) E would suggest a heading of what value in order to fly a course of 045 (Degrees) true? (assume no wind)

    • A.

      025 true

    • B.

      065 magnetic

    • C.

      045 magnetic

    • D.

      025 magnetic

    Correct Answer
    D. 025 magnetic
    Explanation
    An isogonic line with a value of 20 degrees E suggests that there is a magnetic declination of 20 degrees to the east. To fly a course of 045 degrees true, we need to adjust for the magnetic declination. Since the declination is to the east, we subtract the declination from the true course. Therefore, the heading would be 025 degrees magnetic.

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  • 6. 

    What is the approximate difference between the Earth's circumference at the Prime Meridian and its circumference at the equator?

    • A.

      14 statute miles

    • B.

      23 nautical miles

    • C.

      30 statute miles

    • D.

      72 nautical miles

    Correct Answer
    D. 72 nautical miles
    Explanation
    The approximate difference between the Earth's circumference at the Prime Meridian and its circumference at the equator is 72 nautical miles. This means that if you were to travel along the equator, you would cover an additional distance of 72 nautical miles compared to traveling along the Prime Meridian.

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  • 7. 

    What is the approximate distance between two points on the Earth's surface located at 42 n/104 W, respectively?

    • A.

      120 nm

    • B.

      300 nm

    • C.

      104 nm

    • D.

      200 nm

    Correct Answer
    A. 120 nm
    Explanation
    The approximate distance between two points on the Earth's surface located at 42 n/104 W is 120 nm.

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  • 8. 

    How many degrees of longitude represent the distance between Greenwich, England and the International date line?

    • A.

      90

    • B.

      360

    • C.

      270

    • D.

      180

    Correct Answer
    D. 180
    Explanation
    The distance between Greenwich, England and the International date line is half of the Earth's circumference, which is 360 degrees. Since longitude measures the distance east or west of the prime meridian (which passes through Greenwich), the degrees of longitude representing this distance would be half of 360, which is 180.

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  • 9. 

    A course line that crosses all meridians at a constant angle is known as a:

    • A.

      Rhumb line course

    • B.

      Loxodrome

    • C.

      Straight line on a Mercator Map

    • D.

      All the above

    Correct Answer
    D. All the above
    Explanation
    A course line that crosses all meridians at a constant angle is known as a rhumb line course, a loxodrome, and a straight line on a Mercator Map. This means that all three options are correct and can be used interchangeably to describe the same concept.

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  • 10. 

    Which choice of navigational chart would be most INAPPROPRIATE for use at the South Pole?

    • A.

      Mercator Map

    • B.

      Lambert Conformal Chart

    • C.

      Azimuthal Equidistant Projection

    • D.

      Transverse Cylindrical Projection

    Correct Answer
    A. Mercator Map
    Explanation
    A Mercator Map would be the most inappropriate choice for use at the South Pole because it is a cylindrical projection that distorts the size and shape of land masses as you move away from the equator. At the poles, this distortion becomes extreme, causing the map to stretch and exaggerate the size of the polar regions. Therefore, using a Mercator Map at the South Pole would result in significant inaccuracies and make it difficult to accurately navigate and understand the geography of the area.

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  • 11. 

    What minimum instruments would be necessary to navigate via "dead Reckoning"?

    • A.

      Compass, watch , airspeed indicator

    • B.

      Compass, directional gyro, DME

    • C.

      GPS, heading indicator, altimeter

    • D.

      Sextant, chronometer, bowditch

    Correct Answer
    A. Compass, watch , airspeed indicator
    Explanation
    To navigate via "dead reckoning," which is a method of estimating one's current position based on a previously known position and the course and speed traveled since then, three instruments are necessary. A compass is needed to determine the direction of travel, a watch is needed to measure the time spent traveling, and an airspeed indicator is needed to calculate the distance covered. These instruments allow the navigator to make calculations and estimate their current position.

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  • 12. 

    The major error affecting the gyroscopic heading indicator and its use in navigating is:

    • A.

      Magnetic variation

    • B.

      Apparent precession

    • C.

      Rigidity in space

    • D.

      Instrument error

    Correct Answer
    B. Apparent precession
    Explanation
    Apparent precession is the major error affecting the gyroscopic heading indicator and its use in navigating. Apparent precession refers to the gradual drift of the gyroscopic heading indicator over time, causing it to deviate from the true heading. This error occurs due to factors such as friction, bearing wear, and mechanical imperfections in the instrument. As a result, relying solely on the gyroscopic heading indicator for navigation can lead to inaccurate readings and potential navigational errors.

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  • 13. 

    If using a sectional chart with standard parallels equal to 33 20' N and 38 40' N, which of the following course lines would exhibit the highest conformality?

    • A.

      Origin: 39 N/104 W Destination: 35 N/77 W

    • B.

      Origin: 30 N/105 W Destination: 29 N/70 W

    • C.

      Origin: 49 N/ Destination: 48 N/ 35 W

    • D.

      Origin: 50 N/104 W Destination: 45 N/87 W

    Correct Answer
    A. Origin: 39 N/104 W Destination: 35 N/77 W
    Explanation
    The course line from Origin: 39 N/104 W to Destination: 35 N/77 W would exhibit the highest conformality because it lies within the standard parallels of 33 20' N and 38 40' N. Conformality refers to how accurately the shapes and angles on a map correspond to the actual shapes and angles on the Earth's surface. By staying within the standard parallels, the course line would have minimal distortion and maintain a high level of accuracy in representing the true shape and angles of the Earth's surface.

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  • 14. 

    A DME/DME fix is less accurate than a VOR/DME fix

    • A.

      True

    • B.

      False

    • C.

      There is no difference between the two

    • D.

      Option 4

    Correct Answer
    B. False
    Explanation
    A DME/DME fix is not necessarily less accurate than a VOR/DME fix. Both types of fixes rely on different navigation equipment and provide accurate position information. The accuracy of a fix depends on various factors such as the quality and maintenance of the equipment, the distance from the navigation aids, and the presence of any interference or obstacles. Therefore, it cannot be generalized that one type of fix is always less accurate than the other.

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  • 15. 

    Which of the following methods of navigation would result in a great circle track?

    • A.

      Follow the course given by a "direct to" from a GPS

    • B.

      Track a single radial to a VOR

    • C.

      Maintain a bearing to an NDB

    • D.

      All the above

    Correct Answer
    D. All the above
    Explanation
    All of the above methods of navigation would result in a great circle track. A great circle track is the shortest distance between two points on a sphere, and it follows the curve of the Earth's surface. Following the course given by a "direct to" from a GPS, tracking a single radial to a VOR, and maintaining a bearing to an NDB all involve navigating along specific points or directions, which can result in following a great circle track.

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  • 16. 

    A VOR fix, without DME yields which information?

    • A.

      Distance to the station

    • B.

      Time to the station

    • C.

      Azimuth and heading

    • D.

      A "line of position"

    Correct Answer
    D. A "line of position"
    Explanation
    A VOR fix, without DME, yields a "line of position". This means that it provides information about the aircraft's position along a specific radial line from the VOR station. It does not provide distance to the station, time to the station, or azimuth and heading.

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  • 17. 

    What is the approximate distance between point A (68 35' N / 44 40' W) and point B (75 50'N / 135 20'E) hint: you need no formulae!

    • A.

      3700 nm

    • B.

      2135nm

    • C.

      4800nm

    • D.

      6315 nm

    Correct Answer
    B. 2135nm
  • 18. 

    What is the approximate course and distance between points A (25 N/90 W) and B (23 N/87 W)?

    • A.

      Course = 126; Distance = 204 nm

    • B.

      Course = 147; Distance = 336 nm

    • C.

      Course = 310; Distance = 187nm

    • D.

      Course = 275; Distance = 415nm

    Correct Answer
    A. Course = 126; Distance = 204 nm
    Explanation
    Based on the given information, the approximate course between points A and B is 126 degrees, and the approximate distance is 204 nautical miles.

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  • 19. 

    What is the approximate course and distance between points A (22 30'S/ 43 W) and B (20 40'S/45W)?

    • A.

      Course=314;distance=157nm

    • B.

      Course=213;distance=653nm

    • C.

      Course=033;distance=314nm

    • D.

      Course=258;distance =423nm

    Correct Answer
    A. Course=314;distance=157nm
    Explanation
    The approximate course between points A and B is 314 degrees, and the approximate distance is 157 nautical miles.

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  • 20. 

    What is the great circle distance and beginning course between points A (42 N/104 W) and B(50 N/116 W)?

    • A.

      Distance = 448nm;beginning course = 318

    • B.

      Distance = 892nm;beginning course = 137

    • C.

      Distance = 692nm;beginning course = 318

    • D.

      Distance = 765nm; beginning course = 220

    Correct Answer
    C. Distance = 692nm;beginning course = 318
    Explanation
    The great circle distance between points A and B is 692nm. This is the shortest distance between two points on a sphere, in this case, the Earth. The beginning course is 318, which indicates the initial direction from point A towards point B.

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  • 21. 

    What is the great circle distance and beginning course between points A (75 N/2 E) and B (30 S/2 E)? Hint visualize route

    • A.

      Distance = 6400 nm; beginning course = 280

    • B.

      Distance = 2900 nm; beginning course = 130

    • C.

      Distance 3500nm; beginning course = 000

    • D.

      Distance 6300nm: beginning course = 180

    Correct Answer
    D. Distance 6300nm: beginning course = 180
    Explanation
    The great circle distance is the shortest distance between two points on a sphere, measured along the surface of the sphere. In this case, the great circle distance between points A and B is 6300 nm. The beginning course refers to the initial bearing or direction from point A to point B, which in this case is 180 degrees.

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  • 22. 

    What is your begging magnetic heading on a flight from the magnetic south pole (65 S/139 E) to Christchurch, New Zealand (44 33'S/172 40'E)? visualize the course

    • A.

      Need the magnetic variation

    • B.

      318 magnetic

    • C.

      138 true

    • D.

      000 magnetic

    Correct Answer
    D. 000 magnetic
  • 23. 

    IF, at your present position, the sun is at its highst point in the sky (high noon), and the time is exactly 1800Z (UTC), what is your longitude?

    • A.

      90 W

    • B.

      180 W

    • C.

      90 E

    • D.

      60 E

    Correct Answer
    A. 90 W
    Explanation
    At high noon, the sun is directly overhead at the meridian, which is the line of longitude that passes through the observer's location. Since the time is 1800Z (UTC), which is equivalent to noon at the Prime Meridian (0 degrees longitude), the observer's longitude must be 90 degrees west (90 W) of the Prime Meridian.

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  • 24. 

    A Rhumb line on an aeronautical sectional chart would appear as a curved line on a Mercator projection

    • A.

      True

    • B.

      False

    • C.

      True, if drawn near equator

    • D.

      None of the above

    Correct Answer
    B. False
    Explanation
    A rhumb line, also known as a loxodrome, is a line that crosses all meridians of longitude at the same angle, making a constant bearing relative to true or magnetic north. On a Mercator projection, rhumb lines appear as straight lines. This is one of the unique properties of the Mercator projection, where lines of constant bearing are represented as straight lines. Therefore, the statement that a rhumb line would appear as a curved line on a Mercator projection is false.

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  • 25. 

    If you were to navigate (as was done in the time of Colombus) by sailing in a cardinal direction (east or west) along a single latitude, and planned to sail from Dakhala, Morocco (16 degrees West) to Watling Island, in the Bahamas (75 degrees west) at an average speed of 5 knots, How long would the voyage take? Both places are located on the tropic of cancer?

    • A.

      10 days

    • B.

      27 days

    • C.

      30 days

    • D.

      157 days

    Correct Answer
    B. 27 days
    Explanation
    To calculate the duration of the voyage, we need to determine the distance between Dakhala, Morocco (16 degrees West) and Watling Island, Bahamas (75 degrees West) along the same latitude. Since both places are located on the Tropic of Cancer, the distance between them can be calculated by multiplying the difference in longitude (75 - 16 = 59 degrees) by the distance covered in one degree of latitude at the Tropic of Cancer (60 nautical miles). Therefore, the total distance is 59 degrees x 60 nautical miles/degree = 3540 nautical miles. Dividing this distance by the average speed of 5 knots gives us a voyage duration of 3540/5 = 708 hours. Considering that there are 24 hours in a day, the voyage would take approximately 708/24 = 29.5 days. Rounding this off, we get 30 days.

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  • 26. 

    The "celestial Sphere" is an imaginary , earth-concentric surface which is used as a reference system for the stars and planets

    • A.

      True

    • B.

      False

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. True
    Explanation
    The celestial sphere is a concept used in astronomy to simplify the representation of the positions and movements of celestial objects. It is an imaginary sphere centered on Earth, with the observer at the center. This sphere is used as a reference system to track the positions of stars and planets as they appear to move across the sky. It helps astronomers map and study the celestial bodies without having to take into account the complexities of Earth's rotation and orbit. Therefore, the statement is true.

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  • 27. 

    A celestial objects declination is

    • A.

      Expressed in degrees north or south of the celestial equator

    • B.

      Analogous to longitude on the earths surface

    • C.

      Measured in a westerly direction

    • D.

      All of the above

    Correct Answer
    A. Expressed in degrees north or south of the celestial equator
    Explanation
    The correct answer is "expressed in degrees north or south of the celestial equator". Declination is a coordinate used in astronomy to locate celestial objects in the sky. It is similar to latitude on Earth's surface, with positive values indicating north of the celestial equator and negative values indicating south of the celestial equator. This coordinate system helps astronomers determine the position of objects in the sky and navigate the celestial sphere.

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  • 28. 

    The sidereal hour angle (SHA) of a celestial object is

    • A.

      A measure of time referenced to the "first point in Aries"

    • B.

      Analogous to longitude on the earths surface

    • C.

      Measured in a westerly direction

    • D.

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    The sidereal hour angle (SHA) of a celestial object is a measure of time referenced to the "first point in Aries". It is analogous to longitude on the earth's surface and is measured in a westerly direction. Therefore, the correct answer is "all of the above" as all the statements are true.

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  • 29. 

    If the SHA of Vega ( a navigational star) equal 81 degrees and the Greenwich Hour Angle, Aries (GHA of Y) equals 116 degrees, what is the GHA of VEGA

    • A.

      35 degrees

    • B.

      17 degrees

    • C.

      197 degrees

    • D.

      163 degrees

    Correct Answer
    C. 197 degrees
    Explanation
    The Greenwich Hour Angle (GHA) represents the angular distance between the observer's meridian and the meridian of a celestial object. In this question, the SHA of Vega is given as 81 degrees, which means that Vega is located 81 degrees east of the observer's meridian. The GHA of Aries is given as 116 degrees, which means that Aries is located 116 degrees east of the observer's meridian. To find the GHA of Vega, we need to subtract the SHA of Vega from the GHA of Aries. So, 116 degrees - 81 degrees equals 35 degrees. Therefore, the GHA of Vega is 35 degrees.

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  • 30. 

    The point where a ling from the celestial objects center to the center of the Earth crosses the Earths surface is known as its

    • A.

      Celestial longitude

    • B.

      Right hour of ascension

    • C.

      Zenith

    • D.

      Geographic Position

    Correct Answer
    D. Geographic Position
    Explanation
    The point where a line from the celestial object's center to the center of the Earth crosses the Earth's surface is known as its geographic position. This refers to the specific location on the Earth's surface where the celestial object is directly overhead. It is used to determine the coordinates of the celestial object in relation to the Earth's surface. Celestial longitude, right hour of ascension, and zenith are not the correct terms to describe this concept.

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  • 31. 

    If the declination of Rigel ( a navigational star) is 8 degrees 15' S, what is the latitude of its geographic position (GP)?

    • A.

      98 degrees 15' N

    • B.

      8 degrees 15'S

    • C.

      81 degrees 45' N

    • D.

      8 degrees 15'N

    Correct Answer
    B. 8 degrees 15'S
    Explanation
    The declination of a star is the angle between its position in the sky and the celestial equator. In this question, Rigel has a declination of 8 degrees 15' S, which means it is located 8 degrees 15' south of the celestial equator. Since the celestial equator corresponds to the Earth's equator, the latitude of Rigel's geographic position (GP) is also 8 degrees 15' south.

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  • 32. 

    The zenith angle of a celestial objects is

    • A.

      The angle between its GP and the observer, relative to the center of the earth

    • B.

      The angle observed between the object and the vertical

    • C.

      The complement of the objects altitude

    • D.

      All the above

    Correct Answer
    D. All the above
    Explanation
    The zenith angle of a celestial object refers to the angle between its GP (Geographical Position) and the observer, relative to the center of the earth. Additionally, it can also be understood as the angle observed between the object and the vertical. Lastly, the zenith angle is the complement of the object's altitude. Therefore, all the given options correctly describe the zenith angle of a celestial object.

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  • 33. 

    If using a VORTAC-based RNAV unit, "waypoints" are defined as:

    • A.

      GPS- derived latitude/longitude

    • B.

      Azimuth/distance fixes from VOR ground stations

    • C.

      Identified fixes on a VORTAC chart

    • D.

      Assumed DR positions

    Correct Answer
    B. Azimuth/distance fixes from VOR ground stations
    Explanation
    Waypoints, when using a VORTAC-based RNAV unit, are defined as azimuth/distance fixes from VOR ground stations. This means that the waypoints are determined based on the azimuth (the horizontal angle) and distance from VOR ground stations. These fixes provide a precise location for the aircraft's navigation. GPS-derived latitude/longitude refers to using GPS coordinates for defining waypoints, identified fixes on a VORTAC chart are specific locations marked on the chart, and assumed DR positions are dead reckoning positions estimated by the pilot.

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  • 34. 

    Which of the following would NOT be considered an RNAV system?

    • A.

      GPS

    • B.

      LORAN-C

    • C.

      ADF

    • D.

      DME/DME/FMS

    Correct Answer
    C. ADF
    Explanation
    An ADF (Automatic Direction Finder) is a radio navigation system that uses low frequency signals to determine the direction of a radio transmitter. It does not rely on RNAV (Area Navigation) principles, which involve the use of onboard navigation systems to determine aircraft position and track. GPS, LORAN-C, and DME/DME/FMS are all examples of RNAV systems as they utilize advanced navigation technology to provide accurate position information.

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  • 35. 

    RNAV systems provide present position and course to next waypoint

    • A.

      True

    • B.

      False

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. True
    Explanation
    RNAV systems, or Area Navigation systems, are designed to provide aircraft with accurate and continuous position information. They use a combination of onboard sensors and navigation databases to determine the aircraft's present position and calculate the course to the next waypoint. This allows pilots to navigate along specific routes with precision and efficiency. Therefore, the statement that RNAV systems provide present position and course to the next waypoint is true.

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  • 36. 

    Track angle error (TKE) is by definition:

    • A.

      Equal to, but opposite of crosswing correction angle

    • B.

      The difference between actual track and heading

    • C.

      Error introduced by variation of magnetic north

    • D.

      The number of degrees and direction off course

    Correct Answer
    D. The number of degrees and direction off course
    Explanation
    The correct answer is "the number of degrees and direction off course." This means that track angle error (TKE) refers to the amount and direction by which an aircraft is deviating from its intended course. It is a measure of how far off track the aircraft is, indicating both the magnitude and direction of the deviation.

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  • 37. 

    The GPS constellation of 24 satellites is designed so that a minimum of how many satellites are always observable by a user anywhere on earth?

    • A.

      12

    • B.

      4

    • C.

      6

    • D.

      3

    Correct Answer
    B. 4
    Explanation
    The GPS constellation of 24 satellites is designed to ensure that a minimum of 4 satellites are always observable by a user anywhere on earth. This is because GPS receivers need signals from at least 4 satellites to accurately determine their position. By having 4 satellites in view at all times, the GPS system can provide reliable positioning information to users regardless of their location on the earth's surface.

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  • 38. 

    GPS receivers verify the usability of satellite signals through the implementation of RAIM. What does RAIM stand for?

    • A.

      Random anomaly identification mechanism

    • B.

      Receiver autonomous integrity monitoring

    • C.

      Redundant automatic identity measures

    • D.

      Redirected automatic internal monitoring

    Correct Answer
    B. Receiver autonomous integrity monitoring
    Explanation
    RAIM stands for receiver autonomous integrity monitoring. This is a technology used by GPS receivers to ensure the accuracy and reliability of the satellite signals they receive. RAIM helps to identify and mitigate any anomalies or errors in the received signals, ensuring that the GPS receiver can provide accurate position, velocity, and timing information. By monitoring the integrity of the signals autonomously, the receiver can detect and exclude any faulty satellites from its calculations, improving the overall reliability of the GPS system.

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  • 39. 

    Without baro-aiding, what is the minimum number of satellites which must be in view of a GPS receiver to isolate a corrupt signal and remove it from the navigation solution?

    • A.

      8

    • B.

      6

    • C.

      5

    • D.

      4

    Correct Answer
    B. 6
    Explanation
    To isolate a corrupt signal and remove it from the navigation solution, a GPS receiver requires a minimum of 6 satellites in view. This is because the receiver uses a technique called trilateration, where it measures the distance from at least 4 satellites to determine its position. However, with only 4 satellites, the receiver may not have enough information to accurately identify and remove a corrupt signal. By having 6 satellites in view, the receiver can compare the signals from multiple satellites and identify any inconsistencies, allowing it to isolate and remove the corrupt signal.

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  • 40. 

    Which of the following components need not be present in an inertial navigation system (INS)?

    • A.

      An accelerometer

    • B.

      A stable platform/reference system

    • C.

      At least one VOR or GPS input

    • D.

      An alignment procedure

    Correct Answer
    C. At least one VOR or GPS input
    Explanation
    An inertial navigation system (INS) is a navigation aid that uses accelerometers and a stable platform/reference system to determine the position, orientation, and velocity of a moving object. It does not rely on external inputs such as VOR or GPS signals to function. Therefore, the component that need not be present in an INS is at least one VOR or GPS input.

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  • 41. 

    Which of the following components is most critical to the overall system accuracy of a non-strapdown inertial navigation system (INS)?

    • A.

      Accelerometer sensitivity

    • B.

      Initial position fix

    • C.

      Air data computer input

    • D.

      CDU resolution

    Correct Answer
    B. Initial position fix
    Explanation
    The initial position fix is the most critical component for the overall system accuracy of a non-strapdown inertial navigation system (INS). This is because the initial position fix provides the starting point for the navigation system and helps calibrate the inertial sensors. Without an accurate initial position fix, the system may experience significant errors and drift over time. The accelerometer sensitivity, air data computer input, and CDU resolution are important factors but do not have as direct of an impact on the overall system accuracy as the initial position fix.

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  • 42. 

    The difference between an inertial navigation systems (INS) and an inertial reference system (IRS) can be summarized as:

    • A.

      The IRS provides attitude and heading information, but not navigational data

    • B.

      The IRS provides only alignment data to the INS when in ALIGN mode

    • C.

      The IRS can be selected to NAV only mode, but the INS can not

    • D.

      The IRS collects taxes, but the INS only revokes visas

    Correct Answer
    A. The IRS provides attitude and heading information, but not navigational data
    Explanation
    The correct answer is that the IRS provides attitude and heading information, but not navigational data. This means that the IRS is able to provide information about the orientation and direction of the aircraft, but it does not provide specific location or navigation data. This is in contrast to an inertial navigation system (INS), which is designed to provide both attitude and heading information as well as navigational data to determine the aircraft's position and track its movement.

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  • 43. 

    "Drift" as the term is applied to an inertial navigation system, is defined as:

    • A.

      Precession of the vertically aligned gyro

    • B.

      Change of position based on earths rotation

    • C.

      The sum of all cumulative error

    • D.

      The input to the INS from the "air data system"

    Correct Answer
    C. The sum of all cumulative error
    Explanation
    In the context of an inertial navigation system, "drift" refers to the accumulation of errors over time. This means that as the system continues to operate, small errors in measurement or calculation can add up and cause the estimated position to deviate from the actual position. Therefore, "the sum of all cumulative error" is an accurate description of drift in an inertial navigation system.

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  • 44. 

    Which of the following statements is true with respect to "drift" in an INS

    • A.

      Drift is time dependent

    • B.

      Laser ring stabilized systems demonstrate a standard drift of .2 nm/hr

    • C.

      Drift is more critical to a slower airplane

    • D.

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    All of the statements provided are true with respect to "drift" in an INS. Drift is indeed time dependent, meaning it increases over time. Laser ring stabilized systems do demonstrate a standard drift of .2 nm/hr. Additionally, drift is more critical to a slower airplane, as the slower the aircraft, the longer it takes for the drift to accumulate and have a significant impact on navigation. Therefore, all three statements are correct.

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  • 45. 

    What essential information is necessary for the alignment of an INS

    • A.

      Present position and heading

    • B.

      Current temp and atmospheric pressure

    • C.

      Exact Zulu time

    • D.

      Proposed altitude en route

    Correct Answer
    A. Present position and heading
    Explanation
    The alignment of an INS (Inertial Navigation System) requires the essential information of the present position and heading. This is because the system needs to know the starting point and the direction in which the vehicle is currently facing in order to accurately calculate its subsequent movements and track its position. The current temperature, atmospheric pressure, proposed altitude en route, and exact Zulu time are not directly related to the alignment process of an INS.

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  • 46. 

    When utilizing GPS, from how many satellites is it necessary to receive a good signal to determine an accurate positional fix in 3 dimensions?

    • A.

      2

    • B.

      4

    • C.

      6

    • D.

      Option 4

    Correct Answer
    B. 4
    Explanation
    To determine an accurate positional fix in 3 dimensions using GPS, it is necessary to receive signals from at least 4 satellites. This is because GPS works on the principle of trilateration, where the receiver measures the time it takes for signals to travel from multiple satellites to calculate its precise position. With signals from only 3 satellites, the receiver can only determine a 2D position, but with signals from 4 satellites, it can calculate the altitude as well, providing a complete 3D positional fix.

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  • 47. 

    Prior to may 2000, civil users of the global positioning system where provided with a degraded signal. This practice of decreasing precision was known as

    • A.

      Phase shift impedance

    • B.

      Security masking

    • C.

      Selective availability

    • D.

      The forgetful solution

    Correct Answer
    C. Selective availability
    Explanation
    The correct answer is "selective availability". Prior to May 2000, civil users of the global positioning system (GPS) were provided with a degraded signal. This degradation in precision was intentionally done by the U.S. government, and it was known as selective availability. This practice was aimed at maintaining a military advantage by limiting the accuracy of GPS for civilian users. However, in May 2000, the U.S. government discontinued selective availability, allowing for more accurate GPS signals for all users.

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  • 48. 

    Who is responsible for the maintenance of the space and control segments of the GPS

    • A.

      Department of homeland security

    • B.

      DOD

    • C.

      FAA

    • D.

      FCC

    Correct Answer
    B. DOD
    Explanation
    The Department of Defense (DOD) is responsible for the maintenance of the space and control segments of the GPS. This is because the GPS was initially developed by the DOD for military purposes, and they continue to operate and maintain the system. The DOD ensures the accuracy, reliability, and security of the GPS signals, which are used for navigation, timing, and other critical applications worldwide. The other options, such as the Department of Homeland Security (DHS), Federal Aviation Administration (FAA), and Federal Communications Commission (FCC), do not have direct responsibility for the maintenance of the GPS system.

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  • 49. 

    Are GPS VFR waypoints identified on a sectional chart?

    • A.

      Yes

    • B.

      No

    • C.

      Only when coincident with ground based GPS waypoints

    • D.

      Option 4

    Correct Answer
    A. Yes
    Explanation
    GPS VFR waypoints are identified on a sectional chart. This means that these waypoints, which are used for visual flight rules navigation, are marked and displayed on the chart for pilots to reference and navigate accurately using GPS technology.

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  • 50. 

    Can a pilot use GPS VFR waypoints when filing a flight plan?

    • A.

      Only for a VFR flight plan

    • B.

      No

    • C.

      Only as part of an IFR flight plan

    • D.

      Option 4

    Correct Answer
    A. Only for a VFR flight plan
    Explanation
    GPS VFR waypoints can be used by pilots when filing a flight plan, but only if they are planning a VFR (Visual Flight Rules) flight. VFR flight plans are used when the pilot navigates by visual reference to the ground, and GPS waypoints can aid in navigation. However, for an IFR (Instrument Flight Rules) flight plan, pilots must follow specific routes and procedures determined by air traffic control, and GPS waypoints may not be used as part of the flight plan. Therefore, the correct answer is "only for a VFR flight plan."

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Feb 12, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 03, 2016
    Quiz Created by
    Haleymcloud
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