In a region with magnetic declination of 2 E, the magnetic Fore bearing(FB) of a line AB was measured as N79 50'E. There was local attraction at A. To determine the correct magnetic bearing of the line, a point O was selected at which there was no local attraction. The magnetic FB of line AO and OA were observed to be S52 40'E and N50 20'W, respectively. What is the true FB of line AB?

In a region with magnetic declination of 2 E, the magnetic Fore bearin

1.	In a region with magnetic declination of 2 E, the magnetic Fore bearing(FB) of a line AB was measured as N79 50'E. There was local attraction at A. To determine the correct magnetic bearing of the line, a point O was selected at which there was no local attraction. The magnetic FB of line AO and OA were observed to be S52 40'E and N50 20'W, respectively. What is the true FB of line AB?
A.	N81 50 ' E
B.	N82 10 ' SE
C.	N84 10 ' E
D.	N77 50 ' E
Answer» D. N77 50 ' E

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