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GATE 2022 CE (CE2) – Question 24

Geomatics Engineering · Distance and angle measurement, levelling, traversing, triangulation, total station · 1 mark · Multiple choice

If the magnetic bearing of the Sun at a place at noon is S 2° E, the magnetic declination (in degrees) at that place is

  1. 2° E
  2. 2° W
  3. 4° E
  4. 4° W

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Correct answer: (A) 2° E

Explanation

At noon use the stated surveying convention that the Sun lies on the true south meridian, true bearing 180°. Its magnetic bearing S2°E is 178°.

Since true bearing = magnetic bearing + east declination, declination is $180-178=\mathbf{2^\circ E}$, **A**.