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

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.