In this example imagine that we are standing at the pumping
station (bottom right circle) and want to go to the stream junction (top
1st Line up the base plate- Lay the base plate of the compass between
the two points with the direction of travel arrow pointing where you want
to go i.e. to the stream junction (See map2).
note: Using the inner orienting lines of the base plate is more
accurate than using the plastic edge of the base plate
2nd Swivel the compass housing until North (red
N) points to the top of the map, use the parallel orienting lines on the
compass and the blue grid lines on the map to help you.(map3)
note: you can find the top of the map (grid north) by looking
at the writing, most of it runs from west to east with north being at the
3rd Read off the bearing, in this instance 312
4th Add 2 degree's to adjust for the difference
between grid north (which the map points to), and magnetic north (which
the compass needle point's to).
note: this difference varies over time and also with country
, this information is usually specified on the map. The variation given here is
for Snowdonia in 2007
5th Follow the bearing- Swivel the whole compass
until the red end of the needle line's up with the North (red N) on the
compass housing. Then follow the direction of travel arrow.