NCC ‘B’ and ‘C’ Certificate Exam Paper IV- Specialised Subjects (Army): NCC Map Reading Notes and Multiple Choice Questions with Answers.

NCC Map Reading

  1. A map is the geographical representation of land on paper.
  2. Conventional signs are symbols used to represent particular artificial or natural features/objects on the map.
  3. Scale is the proportion of the distance between the two points on the map that relates to the distance between two points on the Ground.
  4. There are two methods of expressing a scale:  In Words and As a Representative Fraction (RF).
  5. The network of purple lines, some running north and south and others west and east, which form a series of small squares all over the map, are called grid lines.
  6. Easting lines are the black vertical lines, and Northing lines are the black horizontal lines.
  7. Relief is the shape of the Ground in a vertical plane.
  8. Contour is an imaginary line drawn on the map showing the same height as the mean sea level.
  9. A slope is a surface on which one end or side is higher than another.
  10. A gradient is the slope of the Ground expressed as the angle the Ground makes with the horizontal.
  11. The distance measured on the map between adjacent contour lines is Horizontal Equivalent. It varies according to the nature of the relief.
  12. Dead Ground is the Ground that is not visible to the observer because of undulations or hills.
  13. The slopes are of two types: convex and concave. A convex slope is the one that bulges outwards, and a concave slope is the one that curves inwards.
  14. North, South, East, and West are known as the cardinal points.
  15. In addition to four Cardinal Points and four intermediate, four significant directions, there are eight minor directions.
  16. There are three types of North: True North, Grid North, and Magnetic North.
  17. True North is the direction of the North Pole.
  18. Grid North is the direction of the North as per the Grid on the map.
  19. Magnetic North is the point to which the compass needle points.
  20. The difference between True North and Magnetic North is called Magnetic Variation.
  21. The amount of the Magnetic Variation depends upon two factors: time and place.
  22. The angular difference between the Grid and True North is called the Angle of Convergence or the Grid Convergence.
  23. The clockwise angle is formed by a straight line joining two points, and the direction of North is called the Bearing between the two points.
  24. There are three types of bearings: Grid, Magnetic, and True Bearing.
  25. Grid Bearing is measured on the map from the Grid North with the help of a protractor. Magnetic Bearing is measured from Magnetic North by the compass. Actual Bearing is calculated by finding the relation between authentic North and Grid North or Magnetic North.
  26. The back Bearing is the opposite of the object’s original position. The rule is that if the Bearing is less than 180 degrees, add 180 degrees; if the Bearing is more than 180 degrees, subtract 180 degrees.
  27. The service protractor “A” Mark IV plots and measures the bearings on the map.
  28. With the help of the service protractor, the magnetic bearings have been converted to grid bearings and transferred to the map.
  29. The magnetic compass has been used extensively in ships, aircraft, and the various branches of the army to find and maintain direction.
  30. The prismatic compass is an accurate and reliable instrument of great value except during a magnetic storm or when subject to a strong local magnetic field, e.g., in polar regions. One can measure a magnetic bearing on the Ground with the prismatic compass.
  31. There are two types of prismatic compass: dry and liquid-filled. Liquid type is easier to use, though it is less sensitive.
  32. A map is said to be set or oriented when placed to correspond directly with the Ground, i.e., when true North on the map points to true North on the Ground.
  33. There are two methods of setting a map: by compass and by objects on the Ground.
  34. Finding out the map’s details on the Ground is known as a map to the Ground. The methods used to identify objects from the map to the Ground are the Bearing and Distance Method, Direction and Distance Method, and Estimation Method.
  35. To find out an object indicated on the Ground on the map is called the Ground to map. The methods used to identify objects from Ground to map are Bearing, Intersection Method, Direction Method, and Estimation Method.
  36. Two methods of finding one’s position on a map are The resection method or the Compass method and the inspection method.
  37. Google Map is a web mapping service developed by Google.
  38. When a navigation party moves at night with the help of a compass and night march chart, it is called Night March.
  39. Global Positioning System(GPS) is a system of satellites and receivers that allows people and devices to pinpoint their precise location on Earth.
  40. The standard GPS operational constellation comprises 24 satellites that orbit the Earth in 12 hours.

NCC ‘B’ and ‘C’ Certificate Exam Paper IV- Specialised Subjects (Army): NCC Map Reading Notes and Multiple Choice Questions with Answers.

NCC Map Reading Quiz-1

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NCC ‘B’ and ‘C’ Certificate Exam Paper IV- Specialised Subjects (Army): NCC Map Reading Notes and Multiple Choice Questions with Answers.

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NCC ‘B’ and ‘C’ Certificate Exam Paper IV- Specialised Subjects (Army): NCC Map Reading Notes and Multiple Choice Questions with Answers.

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