Answer the following statements true (T) or false (F)
1. Magnetic azimuths may differ from true azimuth by several degrees.
2. Local attraction is any local influence that causes the magnetic needle to deflect away
from the magnetic meridian.
3. Grid azimuth is established for a rectangular survey system so that the north–south grids
of the survey are used as the reference line.
4. True azimuth given a 20° magnetic azimuth and 5° east magnetic declination is 15°.
5. Magnetic azimuth + Magnetic declination = True azimuth.
1. True
2. True
3. True
4. False.
Substituting the values into TA = magnetic azimuth + east magnetic declination,
TA = 20° + 5° = 25° true azimuth.
5. False.
Magnetic azimuth + East magnetic declination = True azimuth. Magnetic azimuth
- West magnetic declination = True azimuth.
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