Basic Civil Engineering (3110004)

BE | Semester-1   Winter-2019 | 08-01-2020

Q5) (a)

Differentiate between WCB and QB system.

WCB QB
The horizontal angle made by a line with the magnetic north in the clockwise direction is the whole circle bearing of the line. The horizontal angle made by a line with the magnetic north or south (whichever is closer from the line) in the eastward or westward direction is the Quadrantal Bearing or Reduced Bearing of the line.
The clockwise angle from the reference line is only taken. Both clockwise and anticlockwise angle from the reference line is only taken.
The value of the whole circle bearing varies from 0° to 360°. The value of the reduced bearing varies from 0° to 90°.
Example: 26°, 121°, 245°, 350° etc. Example: N26°E, S59°E, S65°W, N10°W etc.