A property boundry line had a magnetic baring of S27 degrees 18\'27\"W in 1937 when the magnetic declination was W8 degree 58\'01\". What was the magnetic bearing of this same line in 1954 when the declination was W8 degree 51\'09\"? Solution True Bearing = Magnetic bearing + Magnetic declination ( West magnetic declination is added) True Bearing = 27 o 18\' 27\" + 8 o 58\'01\" = S 36 o 16\'28\" W In 1954 True bearing will remain same True Bearing = Magnetic bearing + Magnetic declination S 36 o 16\'28\" W = Magnetic bearing + 8 o 51\'09\" Magnetic Bearing = S 27 o 25\' 19\" W .