Plotting a bearing on your map

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# Plotting a bearing on your map - PowerPoint PPT Presentation

Plotting a bearing on your map. Castle Rock Quad. You have just located the first point in an orienteering course. The clue indicates that the next location is 1.2km away on a bearing of 286° True. Your GPS indicates that you are currently at 586362m E 4113408m N.

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Presentation Transcript
Plotting a bearing on your map

Castle Rock

• You have just located the first point in an orienteering course. The clue indicates that the next location is 1.2km away on a bearing of 286° True. Your GPS indicates that you are currently at 586362m E 4113408m N.
• Use the Castle Rock Quad and follow along as we locate our next course point.
Plotting a bearing on your map
• You have just located the second point in an orienteering course. The clue indicates that the next location is 1.9km away on a bearing of 138° True. Your GPS indicates that you are currently at 585220m E 4113710m N.
• Use the Castle Rock Quad and follow along as we locate our next course point.
Plotting a Magnetic Bearing
• Standing at a known road junction, we sight a bearing to a nearby mountain top. We get 234° Magnetic as our bearing.
• The local declination is 15°E so we add 15° to 234° to get 249° True.
Plotting a Magnetic Bearing
• We set our compass to 249°
• We line the north-south parallel lines in the bezel up with a north-south line on the map.
• We move the compass until the edge is on the road junction.
• We draw the bearing line onto the map.
Getting a Bearing from the Map
• Place the edge of the compass along the desired line of travel.
• Rotate the bezel until it is lined up with true north.