Competence 1 (Deck)

20 Questions | Total Attempts: 2940

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Competency Quizzes & Trivia

Questions and Answers
  • 1. 
    Where can the data relating to the direction and velocity of rotary tidal currents be found?
    • A. 

      Tidal Current Tables

    • B. 

      Mariner's Guide

    • C. 

      Tide Tables

    • D. 

      Nautical Almanac

  • 2. 
    What is the nature of the beam transmitted by echo sounder?
    • A. 

      Parabolic

    • B. 

      Directional

    • C. 

      Hyperbolic

    • D. 

      Linear

  • 3. 
    Which statement about the Flinders bar on a magnetic compass is correct?
    • A. 

      It corrects the semi-quadrantal error at intercardinal headings.

    • B. 

      It compensates for the error caused by the vertical component of the earth's magnetic field.

    • C. 

      It allows the magnetic compass to move freely in the fluid.

    • D. 

      It reduces the deviation into half.

  • 4. 
    What is a chart that covers a large area?
    • A. 

      Large scale chart

    • B. 

      General chart

    • C. 

      Coastal chart

    • D. 

      Small scale chart

  • 5. 
    Which chart symbol indicates that the bottom is coral?
    • A. 

      Sh

    • B. 

      Cl

    • C. 

      Co

    • D. 

      R

  • 6. 
    When navigating using DGPS, you may expect your position to be accurate to within a radius of ________ meters.
    • A. 

      100 m

    • B. 

      50 m

    • C. 

      20 m

    • D. 

      10 m

  • 7. 
    The standard atmospheric pressure in millimeters of mercury is:
    • A. 

      960

    • B. 

      760

    • C. 

      23.25

    • D. 

      29.92

  • 8. 
    The interval between the sun's upper limb being in the horizon and its center being 12 degrees below is called:
    • A. 

      Astronomical twilight

    • B. 

      Civil twilight

    • C. 

      Nautical twilight

    • D. 

      Observational twilight

  • 9. 
    In the IALA Buoyage System, what is the color of an East Cardinal Mark?
    • A. 

      Black band with above and below yellow band

    • B. 

      Black band above and below yellow band

    • C. 

      Black band below yellow band

    • D. 

      Black band above yellow band

  • 10. 
    Which statement is TRUE concerning "night effect" and the reception of radio signals?
    • A. 

      "Night effect" is most prevalent late at night

    • B. 

      During "night effect", polarization is at a minimum

    • C. 

      "Night effect" is caused by all of the polarized ground waves being vertical

    • D. 

      "Night effect" is caused by rapid changes in the ionosphere

  • 11. 
    The standard time meridian for zone description -1 is:
    • A. 

      15deg. E

    • B. 

      7 1/2deg. E

    • C. 

      0deg.

    • D. 

      7 1/2deg. W

  • 12. 
    Polaris is always within how many degrees of the north pole?
    • A. 

      1 degree

    • B. 

      0.2 degree

    • C. 

      0.5 degree

    • D. 

      0.1 degree

  • 13. 
    The mean distance between the earth and the sun is:
    • A. 

      1 astronomical unit (AU)

    • B. 

      1 celestial unit

    • C. 

      1 parsec

    • D. 

      4.3 light years

  • 14. 
    A general chart could have a scale of:
    • A. 

      1. 50,000

    • B. 

      Not more than 1. 25,000

    • C. 

      1. 200,000

    • D. 

      1. 1,000,000

  • 15. 
    The standard sea level pressure of the atmosphere is:
    • A. 

      1013.25 millibars of mercury

    • B. 

      1012.45 millibars of mercury

    • C. 

      1013.52 millibars of mercury

    • D. 

      1012.35 millibars of mercury

  • 16. 
    A vessel is following a range to keep herself if within a narrow channel. The chart indicates the range to be 243deg. The vessel is on range, when she is steering a course of:
    • A. 

      234deg. T

    • B. 

      063deg. T

    • C. 

      270deg. T

    • D. 

      243deg. T

  • 17. 
    Due to the revolution of the earth around the sun, a sidereal day is shorter than a solar day by about:
    • A. 

      3 mins and 26 secs

    • B. 

      3 mins and 36 secs

    • C. 

      3 mins and 06 secs

    • D. 

      3 mins and 56 secs

  • 18. 
    The apparent wind can be zero when the true wind is from:
    • A. 

      Astern and equal to the ship's speed

    • B. 

      Ahead and equal to the ship's speed

    • C. 

      Ahead and equal to twice the ship's speed

    • D. 

      Astern and equal to twice the ship's speed

  • 19. 
    If your vessel is dragging her anchor in a strong wind, you should:
    • A. 

      Increase the scope of anchor cable

    • B. 

      Shorten the scope of anchor cable

    • C. 

      Put over a stern anchor

    • D. 

      Dropped another anchor

  • 20. 
    From those listed, which would be the preferred method of position fixing for greatest accuracy and certainty of position?
    • A. 

      Taking a radar range and radar bearing

    • B. 

      Taking several radar bearings

    • C. 

      Taking several radar ranges

    • D. 

      Taking a radar range and visual bearing