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The bearing from A to B is 070 degrees. What is the bearing from B to A?

  • A.160 degrees
  • B.250 degrees
  • C.290 degrees
  • D.110 degrees

Answer: B

A back bearing differs from the forward bearing by 180 degrees, and since 070 is less than 180 the figure is added rather than subtracted. Subtracting instead would give a negative value, which is the usual error and an immediate sign that the wrong rule has been applied.

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