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1. OPERATION
1-29
4. Choose MAGNETIC or TRUE as appropriate and then press the [ENT] key.
5. Press the [MENU] key twice to close the menu.
1.16 Magnetic Variation
The location of the magnetic north pole is different from the geographical north
pole. This causes a difference between the true and magnetic north direction.
This difference is called magnetic variation, and varies with respect to the
observation point on earth. Your unit is preprogrammed with all the earth's
magnetic variation. However, you may wish to enter variation manually to refine
accuracy. To use magnetic variation, “BRG READ” on the SYS SETUP menu
must be set to “MAGNETIC.”
1. Press the [MENU] key once or twice to open the menu.
2. Choose SYS SETUP and then press the [ENT] key.
3. Choose MAG VAR. and then press the [ENT] key.
AUTO
MANUAL
MAG VAR. options
4. Choose AUTO or MANUAL as appropriate and then press the [ENT] key. For
AUTO go to step 5. For MANUAL, enter magnetic variation as below,
referring to a nautical chart:
a) Press the [ENT] key.
b) Use ▲ or ▼ to choose West or East as appropriate.
c) Press ► to shift the cursor one place rightward.
d) Use ▲ or ▼ to enter appropriate numeric.
e) Press ► to shift the cursor one place rightward.
f) Use ▲ or ▼ to enter appropriate numeric.
g) Press the [ENT] key.
5. Press the [MENU] key twice to close the menu.