wireless Seismic RT System 2 - Figure F-3 Compass and Map

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186 RT System 2 v2.3 Deployment Guide R01.i

F. Using a Compass

3 Adjust for declination.

Ɣ If you have an adjustable compass – Move the Orienting Arrow to the right or left by

the declination number. When you align the magnetic needle with the Orienting

Arrow, the declination is accounted for.

Ɣ If you do not have an adjustable compass – Mark the declination on your compass

with a piece of tape. Align the magnetic needle with the tape mark.

Ɣ Adjust the Orienting Arrow to the left or right. For example:

Ź For a declination of 0, no adjustment is necessary.

Ź For a declination of 9 (9 degrees East), move the Orienting Arrow (or place a

tape mark) to the right 9 degrees.

Ź For a declination of -9 (9 degrees West), move the Orienting Arrow (or place a

tape mark) to the left 9 degrees.

Figure F–3 Compass and Map