12npa 50

50 Questions | Total Attempts: 202

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12npa 50

prelim 122


Questions and Answers
  • 1. 
    The light of an east cardinal mark signifies how many flashes in a groups
    • A. 

      Uninterrupted

    • B. 

      Three

    • C. 

      Six

    • D. 

      Nine

  • 2. 
    A light showing over a very narrow sector, forming a single leading light is called
    • A. 

      Subsidiary light

    • B. 

      Sector light

    • C. 

      Direction light

    • D. 

      Leading light

  • 3. 
    Which of the follwing countries belong to IALA region B
    • A. 

      Australia

    • B. 

      Europe

    • C. 

      Africa

    • D. 

      Japan

  • 4. 
    Which of the following is the abbreviation for alternating light
    • A. 

      Alt

    • B. 

      Alter

    • C. 

      Alt lt

    • D. 

      Al lt

  • 5. 
    Under the IALA A buoyage system, a buoy displaying a green light will be left in what direction
    • A. 

      To port

    • B. 

      To starboard

    • C. 

      Both a and b

    • D. 

      Neither a nor b

  • 6. 
    A natural or artificial mark used to assist a vessel in avoiding a particular hazard is called
    • A. 

      Sea mark

    • B. 

      Land mark

    • C. 

      Night mark

    • D. 

      Clearing mark

  • 7. 
    Which of the following are specially equipped vessels anchored at specific locations to serve as aids to navigation
    • A. 

      Tugboats

    • B. 

      Light sector

    • C. 

      Light ships

    • D. 

      Private aids

  • 8. 
    What does the smbols    means
    • A. 

      Light buoy

    • B. 

      Position of light

    • C. 

      Lighted offshore platform

    • D. 

      Aeronautical light

  • 9. 
    The light of a north cardinal mark signifies how many flashes
    • A. 

      Uninterrupted

    • B. 

      Three

    • C. 

      Six

    • D. 

      Nine

  • 10. 
    Type of  cardinal mark the color of which is black below yellow is called
    • A. 

      North

    • B. 

      South

    • C. 

      West

    • D. 

      East

  • 11. 
    Which of the following is a light presenting different appearance, over various part of the horizon of interest to maritime navigation
    • A. 

      Subsidiary light

    • B. 

      Sector light

    • C. 

      Direction light

    • D. 

      Leading light

  • 12. 
    Characteristic of light wherein the total duration of light in a period is longer than the total duration of darkness is called
    • A. 

      Fixed

    • B. 

      Flashing

    • C. 

      Occulting

    • D. 

      Isophase

  • 13. 
    The color used for a special mark is
    • A. 

      Black and yellow

    • B. 

      Red ang black bands

    • C. 

      Yellow

    • D. 

      Red and white stripes

  • 14. 
    Which of the following is the color of the light displayed by a special mark
    • A. 

      White

    • B. 

      Red

    • C. 

      Green

    • D. 

      Yellow

  • 15. 
    If all these land marks are charted, which of them is less reliable
    • A. 

      Buoy

    • B. 

      Island

    • C. 

      Light house

    • D. 

      Mountain peak

  • 16. 
    Type of cardinal mark the color of which is black above yellow is called
    • A. 

      North

    • B. 

      South

    • C. 

      West

    • D. 

      East

  • 17. 
    What type of mark when seen during daytime, is colored with red and black horizontal bands
    • A. 

      Cardinal marks

    • B. 

      Isolated danger mark

    • C. 

      Safe water mark

    • D. 

      Special mark

  • 18. 
    Characteristic of light wherein the total duration of light in a period is equal to the total duration of darkness is called
    • A. 

      Fixed

    • B. 

      Flashing

    • C. 

      Occulting

    • D. 

      Isophase

  • 19. 
    What does the symbol wks mean  
    • A. 

      Wreckage

    • B. 

      Wreck always partially submerged

    • C. 

      Sunken wreck

    • D. 

      Wreck over which depth is known

  • 20. 
    The light of a south cardinal mark signifies how many flashes in a group
    • A. 

      Uninterrupted

    • B. 

      Three

    • C. 

      Six followed by 1 long flash

    • D. 

      Nine

  • 21. 
    The light of a special mark signifies how many flashes in a group
    • A. 

      Single flash

    • B. 

      Group of five flashes every 20 seconds

    • C. 

      Three

    • D. 

      Six

  • 22. 
    What does the symbol              AERO mean
    • A. 

      Light buoy

    • B. 

      Position of light

    • C. 

      Lighted offshore platform

    • D. 

      Aeronautical ligt

  • 23. 
    When will you rely on the position of floating aids to navigation
    • A. 

      During daylight

    • B. 

      During clam weather

    • C. 

      When inside the harbor

    • D. 

      When no fixed aid is avaiable

  • 24. 
    Which of the following is the abbreviation for fixed light
    • A. 

      F

    • B. 

      Fi

    • C. 

      Fl

    • D. 

      F x L

  • 25. 
    Which of the following is the distance from the position abvoe the surface of the earth from the line of sight to the horizon
    • A. 

      Geographic range

    • B. 

      Horizon distance

    • C. 

      Luminous range

    • D. 

      Charted visibility