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The following bearing observed in the area where local attraction was suspected determine the correct magnetic bearing if the declination is 3$^\circ$30' east.
written 7.3 years ago by gravatar for saxena_archit saxena_archit • 760 modified 6.1 years ago by gravatar for sanketshingote sanketshingote • 100
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written 7.3 years ago by gravatar for saxena_archit saxena_archit • 760 modified 7.2 years ago by gravatar for sanketshingote sanketshingote • 100

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Line FB BB Declination
PQ 220$^\circ$30' 41$^\circ$15' 3$^\circ$30'E
QR 260$^\circ$45' 79$^\circ$30' 3$^\circ$30'E
RS 19$^\circ$30' 200$^\circ$ 3$^\circ$30'E
SP 100$^\circ$ 280$^\circ$ 3$^\circ$30'E

The difference of BB and FB of SP is 180O hence station S and P free from local attraction

  1. FB of PQ= 220$^\circ$30’, BB Of PQ= 41$^\circ$15’

    FB-BB= 220$^\circ$30’ - …

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