Understanding Latitude and Longitude
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Questions and Answers

What is the reference point for measuring latitude and longitude?

  • The centre of the Earth
  • The South Pole
  • The intersection of the prime meridian and the equator (correct)
  • The North Pole

    • What is the designation for an angular position below the equator?

  • West
  • South (correct)
  • East
  • North

    • How many minutes are in one degree?

  • 120
  • 60 (correct)
  • 100
  • 90

    • What is the correct identification for point P in the illustration?

    <p>40 degrees north latitude and 60 degrees west longitude</p> Signup and view all the answers

    How many seconds are in one minute?

    <p>60</p> Signup and view all the answers

    What is the location of Brisbane in terms of latitude and longitude?

    <p>27 degrees, 28 minutes, 14 seconds south latitude, and 153 degrees, 2 minutes, 45 seconds east longitude</p> Signup and view all the answers

    What is the primary function of the partially transparent mirror in a laser gyro?

    <p>To direct beams to the photocell detectors</p> Signup and view all the answers

    How many laser gyros are used in an Inertial Reference Unit (IRS)?

    <p>Three</p> Signup and view all the answers

    What is the purpose of the mode selector unit in an Inertial Reference Unit (IRS)?

    <p>To provide user interfacing</p> Signup and view all the answers

    What is the frequency change of the laser beam caused by the Earth's rotation rate of 15 degrees per hour?

    <p>4 Hz</p> Signup and view all the answers

    What is the primary advantage of using an Inertial Reference Unit (IRS) in an aircraft?

    <p>Reduced equipment usage</p> Signup and view all the answers

    How are the three accelerometers in an Inertial Reference Unit (IRS) aligned with respect to each other?

    <p>Perpendicular</p> Signup and view all the answers

    What is the primary method used by pilots to navigate in the simplest form of air navigation?

    <p>Observing the relative position of landmarks</p> Signup and view all the answers

    What is the main disadvantage of pilotage in air navigation?

    <p>Poor visibility can prevent pilots from seeing landmarks</p> Signup and view all the answers

    What is the term used to describe the method of navigation that determines an aircraft's position by using its speed, time underway, and direction?

    <p>Dead reckoning</p> Signup and view all the answers

    What is a potential problem associated with dead reckoning in air navigation?

    <p>Incorrectly recorded wind velocity and direction</p> Signup and view all the answers

    What is the primary purpose of aeronautical charts in air navigation?

    <p>To compare sightings with symbols for navigation</p> Signup and view all the answers

    Why did the invention of the compass form the basis of navigation?

    <p>It enabled mariners to begin reckoning their approximate position</p> Signup and view all the answers

    What is the primary function of the self-monitoring circuits in the VOR receiver?

    <p>To validate the signals received and the accuracy of the bearing information sent to the indicator</p> Signup and view all the answers

    How many complete VOR systems are commonly found on most commercial aircraft?

    <p>Two</p> Signup and view all the answers

    What is the frequency range for selecting navigation frequencies in the VOR system?

    <p>108 to 118 MHz</p> Signup and view all the answers

    What is the purpose of the control unit in the VOR system?

    <p>To provide off to on control and frequency selection for the VOR system operation</p> Signup and view all the answers

    What is the instrument that displays bearing information from the VOR and ADF?

    <p>Radio Magnetic Indicator (RMI)</p> Signup and view all the answers

    What is the purpose of the pilot switching between ADF and VOR?

    <p>To switch between different navigation modes</p> Signup and view all the answers

    What is the primary function of the transmitter section in the DME transmitter/receiver?

    <p>To generate, amplify, and transmit the interrogating signal</p> Signup and view all the answers

    What is the purpose of the VOR control unit in the DME system?

    <p>To provide control, tuning, and switching circuits for the DME system</p> Signup and view all the answers

    What is the unit of measurement displayed on the distance indicator?

    <p>Nautical miles</p> Signup and view all the answers

    What is the condition for the computed ground speed and TTS to be accurate?

    <p>If the aircraft is flying directly to or from the ground station</p> Signup and view all the answers

    What is the purpose of the flag or warning displayed on the distance indicator?

    <p>To indicate system malfunction or no lock on to a reply signal</p> Signup and view all the answers

    What is an alternative location where the DME distance indication may be displayed?

    <p>Horizontal Situation Indicator (HSI)</p> Signup and view all the answers

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