The latitude and departure of a line AB are +78 m and

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The latitude and departure of a line AB are +78 m and – 45.1 m, respectively. The whole circle bearing of the line AB is

1. 30°
2. 150°
3. 210°
4. 330°

Correct Option: D

Since the latitude of line is positive and departure is negative, the line lies in the second quadrant.
∴ l cos θ = 78
l sin θ = – 45.1
⇒ tan θ = – 0.578
θ = – 30°
∴ WCB of AB = 360° – 30° = 330°