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Question 1 of 4
1. Question
The main parts of a compass are:
1. Scales or rulers
2. Direction of travel arrow
3. Base plate
4. Orientating arrow
5. Orientating lines
6. Index line
7. Magnetic needle
8. Rotating housing
9. Declination scale/marks
10. Dial with degrees
11. Sighting mirror (optional)CorrectIncorrect -
Question 2 of 4
2. Question
Magnetic declination, or magnetic variation is the angle on the horizontal plane between magnetic north ( the direction the north end of a magnetized compass needle points, corresponding to the direction of the earths magnetic field lines) and true north ( the direction along a meridian towards the geographic north.
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Question 3 of 4
3. Question
Where do I find the declination difference between MN & TN for the area I am working or traveling in?
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Question 4 of 4
4. Question
True North also called geodetic north is the direction along earths surface towards geographic North Pole. Magnetic North is the direction in which the north end of a compass needle points in response to the earths magnetic field. It deviates from True north over time and from place to place because the earths magnetic poles are not fixed in relation to its axis.
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