Set a Map

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The very first step in map and compass navigation is to set the map. What this does is to lay the map out in the same configuration as on the actual ground. This will enable you to find your location on the map more easily (by making direct references with the features you can visibly see and verify consistencies with the map and the ground). A set map will also allow you to take bearings between points on a map.

What do you need?

A topographic map (or a map that has grid lines)
An orienteering compass

Step 1:

Place the map on a flat surface which has little or no metal to avoid inaccurate readings.
*If in an urban setting, concrete is most likely reinforced with steel bars making them a poor choice for placing your map on. In such areas, you may want to keep the map elevated in your arms to avoid inaccurate readings

Align Orienteering Arrow with Magnetic Needle

Step 2:

Set the orienteering arrow to face north or at a zero degree bearing. Align the magnetic needle with the orienteering arrow.
*For some maps, like Singapore topographic maps, you need not adjust for the grid magnetic angle as grid north and magnetic north are the same. However this may not be the case for maps in other regions and you should check and compensate for these differences (always stated in the maps)

Aligning the Direction of Travel Arrow with Northing

Step 3:

Place the compass with the magnetic needle and orienteering arrow point north on the map. Adjust the map till the direction of which the compass points to is very close to the Easting (North to South grid lines).

Flushing the edges of the compass with the grid lines

Step 4:

Align the direction of travel arrow exactly with a Northing. You could also flush the sides of the compass with the grid lines, as shown.

Your map is set.

Set a map with a Silva Compass | And a topographic map

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Set a Map

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