The magnetic bearing of the sun for a location at noon is 183° 30'. If the sun is exactly on the geographic meridian at noon, the magnetic declination of the location is _________.

3° 30' W
3° 30' E
93° 30' W
93° 30' E

Correct answer: 3° 30' W

Solution

The magnetic declination is the difference between magnetic north and true north. Since the sun is on the geographic meridian at noon, and the magnetic bearing is 183° 30', this indicates that magnetic north is 3° 30' west of true north.

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