3. In a compass survey made fifty(50) years ago, the observed magnetic bearing of a reference line XY was 50° 18' E when the magnetic declination was 8° 15' east. In 1986, a new survey was made and the declination of the same survey site changed to 12° 10' west. Determine the following descriptions of line XY:

Structural Analysis
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Chapter2: Loads On Structures
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3. In a compass survey made fifty(50) years ago, the
observed magnetic bearing of a reference line XY was S
50° 18' E when the magnetic declination was 8° 15'
east. In 1986, a new survey was made and the
declination of the same survey site changed to 12° 10'
west. Determine the following descriptions of line XY:
(a) its true bearing
(b) true azimuth from south
(c) its magnetic bearing in 1986
(d) magnetic azimuth from south in 1986
Transcribed Image Text:3. In a compass survey made fifty(50) years ago, the observed magnetic bearing of a reference line XY was S 50° 18' E when the magnetic declination was 8° 15' east. In 1986, a new survey was made and the declination of the same survey site changed to 12° 10' west. Determine the following descriptions of line XY: (a) its true bearing (b) true azimuth from south (c) its magnetic bearing in 1986 (d) magnetic azimuth from south in 1986
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