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Resection is the technique of fixing one's own position by

  • A.estimating the height from the contour pattern
  • B.taking bearings to two or more known features
  • C.measuring the distance walked from a known point
  • D.reading a grid reference off the nearest sign

Answer: B

Bearings to identifiable landmarks are plotted back from those landmarks, and the observer stands where the lines meet. Two landmarks suffice in principle, but three are used so the small triangle they form reveals the error.

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