The quadrantal bearing of a line is directly observed by:
Show Hint
- Prismatic compass
- Surveyor's compass
- Celestial observations
- Magnetic declination
The Correct Option is B
Solution and Explanation
Step 1: Understanding Quadrantal Bearing System.
Quadrantal bearings (also called reduced bearings) are measured with respect to the North or South direction towards East or West, restricted to $0^\circ$ to $90^\circ$.
Step 2: Observation instrument.
The Surveyor's Compass is designed to directly measure quadrantal bearings. On the other hand, the Prismatic Compass directly reads whole-circle bearings.
Step 3: Analysis of options.
- (A) Prismatic compass: Measures whole circle bearings, not quadrantal.
- (B) Surveyor's compass: Directly gives quadrantal bearings.
- (C) Celestial observations: Used for astronomical bearings, not quadrantal.
- (D) Magnetic declination: It's a correction, not an observation method.
Step 4: Conclusion.
The quadrantal bearing is directly observed using a Surveyor's Compass.
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