Subtopic: Power efficiencies and measurement, engine performance curves
Question Statement:
The magnetic bearing of a line at a station point is found to be 182°. The magnetic declination at the station is 3° E and the local attraction is −1° for correction. The true bearing of the line is
Options:
(A) 186°
(B) 184°
(C) 180°
(D) 178°
Official Answer Key:
B
Step-by-Step Solution & Explanation
True bearing = Magnetic bearing + Magnetic declination (east declination is added) + local-attraction correction. True bearing = 182° + 3° + (−1°) = 184°, matching option (B). (East declination means true north lies east of magnetic north, so it is added to the magnetic bearing to obtain the true bearing; the given local attraction correction of −1° is applied algebraically as stated.)
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