Compass Calibration

Since the apparent position of magnetic North will vary according to your location in the world (especially Latitude), you will need to know the difference between these two positions (Magnetic and True North) to take an accurate bearing. To calibrate the compass for the effects of magnetic variation, proceed as follows:

NOTE: When calibrating the compass, make sure the unit is at least 2 yards away from any source of magnetic interference.

1.From the FRS TWO WAY mode (CH and CODE displayed), press the Function(F) button 3 times; COMPASS is momentarily displayed, followed by the heading indication.

2.Press the right menu button; CALIB appears with OFF flashing.

3.Press the Up button (6); flashing TUN appears.

4.Place the unit on a flat non-metallic surface and rotate the unit twice, very slowly at a constant rate, through 360 degrees, taking about 10 seconds to complete thesuccessive circles.

5.Press the Up or Down button; CALIB appears with OFF flashing.

6.Press the Monitor (M) button to confirm compass calibration and initiate the compass function.

To insert compensation for the effects of magnetic variation, perform the following steps:

7.Repeat steps 1 and 2, and press the right menu button twice; VARI appears with a flashing 0 (if no magnetic variation has been inserted).

8.Press and hold the Up button (6); variation increases quickly between 0 and +90. If the Up button continues to be held, variation will begin to decrease from -90 to 0 after +90 is reached. The Down button will also perform the same function in the reverse manner.

The following table presents a list of declination angles for a number of major world cities; insert the proper value to compensate for the effects of magnetic variation when you are in the specified location.

Anchorage +22

Atlanta -4

Bombay -1

Boston -16

Calgary -18

Chicago -3

Denver -4

Jerusalem +3

London -4

Little Rock +3

Livingston +14

Munich +1

New York	-14
Orlando	-5
Oslo	-2
Paris	-2
Rio De Janeiro	-21
San Francisco	+15

Seattle	+19
Seoul, Korea	-7
Shanghai	-5
Toronto	-11
Vancouver	-20

Washington DC -10 Waterbury, CT -14