If the angle of declination in a place is 10oE, calculate the true geographic bearing if the compass reads N40oE
N50oE
N40oE
N30oE
N25oE
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The angle of declination is the angle between magnetic north and true north (geographic north). It can be either east or west, depending on the location. In this case, the angle of declination is 10oE, meaning that magnetic north is 10o east of true north.
When using a compass, it measures the magnetic bearing, which is based on the magnetic north. In this question, the compass reads N40oE, which means the angle between magnetic north and the direction of interest is 40o east.
To find the true geographic bearing, we need to consider the angle of declination. Since the angle of declination is 10oE, we need to subtract 10o from the magnetic bearing to obtain the true geographic bearing:
N
40
o
E
−
10
o
=
N
30
o
E
So, the true geographic bearing is N30oE (Option C).
The angle of declination is the angle between magnetic north and true north (geographic north). It can be either east or west, depending on the location. In this case, the angle of declination is 10oE, meaning that magnetic north is 10o east of true north.
When using a compass, it measures the magnetic bearing, which is based on the magnetic north. In this question, the compass reads N40oE, which means the angle between magnetic north and the direction of interest is 40o east.
To find the true geographic bearing, we need to consider the angle of declination. Since the angle of declination is 10oE, we need to subtract 10o from the magnetic bearing to obtain the true geographic bearing: N40°E - N10°E = 30°E
So, the true geographic bearing is N30oE (Option C).
