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Basic Navigation

Basic Navigation. Lecture 2 ACP32 Vol2. Basic Navigation. By the end of this lecture you should know: The anatomy of a typical compass How to set a map with a compass Taking a bearing Resection. Anatomy of Compass. Anatomy of Compass. Magnetic Variation.

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Basic Navigation

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  1. Basic Navigation Lecture 2 ACP32 Vol2

  2. Basic Navigation • By the end of this lecture you should know: • The anatomy of a typical compass • How to set a map with a compass • Taking a bearing • Resection

  3. Anatomy of Compass

  4. Anatomy of Compass

  5. Magnetic Variation • The needle of the compass aligns with the earth’s magnetic field. • If your compass is near large amounts of metal or electrical equipment you will not get a true magnetic reading.

  6. Setting a Map with a Compass • Ideal in reduced visibility or low-feature environments. • 1, Turn the capsule until the GMA is set against the direction arrow. • 2, Place the compass on the map with the edge along a North-South grid line. • 3, Turn BOTH the map and the compass until the needle aligns in the orienting arrow in the capsule • The map is now set!

  7. Taking a Bearing • Not a Bear Ring, a Bearing or heading!

  8. Taking a Bearing • Use this to stay on track and provide a hand held travel aid without the need to keep the map set and in your face. • 1, Place the edge of the compass on the map between your position and your objective.

  9. Taking a Bearing • 2, Turn the capsule so the orienting lines align with the North-South grid lines. • 3, Turn the capsule again to add the GMA. (GRID to MAG, ADD)

  10. Taking a Bearing • 4, Hold the compass in front of you and turn until the needle falls in the orienting arrow. • The direction of travel arrow now point at the objective.

  11. Taking a Bearing • You can also use bearings to check what a feature is. • 1, Point the direction of travel arrow at the feature. • 2, Turn the capsule until the needle aligns with the orienting arrow. • 3, Turn the capsule again to deduct the GMA (MAG to GRID, GET RID).

  12. Taking a Bearing • 4, Place the compass on the map, edge on your position. • 5, Pivot the compass around your position until the orienting lines run North-South. • The edge of the compass will now align your position with the feature on your map

  13. Resection • Used to “get your bearings” and check exactly where you are. • Repeat the previous steps for identifying a feature with a bearing at least 3 times on three different features. • Where these lines intersect is your exact position.

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