Furuno gp37 用户手册

7. OTHER FUNCTIONS 

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. Set “BRG REF” on the PLOTTER 
is set to “MAG” to use magnetic variation. 
 
1.  Press the [MENU] key once or twice to 

open the menu. 

2.  Choose PLOTTER and then press the 

[ENT] key. 

3.  Choose MAG. VAR. 
4.  Press the [ENT] key. 
5.  Choose AUTO or MAN as appropriate 

and then press the [ENT] key. For 
automatic magnetic variation, current 
magnetic variation appears to the right of 
AUTO. 

6.  If you selected AUTO, no further 

operation is necessary; go to step 7. For 
MAN, press the [ENT] key and enter 
magnetic variation as follows: 

a) If necessary, change coordinate from   

east to west or vice versa by pressing 
▲ or ▼. 

b) Press ► to shift cursor, use ▲ or ▼ to 

set value, referring to a nautical chart. 

c)  Press the [ENT] key. 

7.  Press the [MENU] key twice to finish. 
 
 

Your unit is preprogrammed to recognize 
most of the major chart systems of the world.   
Although the WGS-84 system, the GPS 
standard, is now widely used other categories 
of charts still exist. Choose the chart system 
used, not the area where your boat is sailing. 
The default chart system is WGS-84. 
 

1.  Press the [MENU] key once or twice to 

open the menu. 

2.  Choose SYS SETUP and then press the 

[ENT] key. 

 

3.  Choose DATUM and then press the [ENT] 

key. 

4.  Choose WGS84 (GPS standard), WGS72 

or OTHER as appropriate and then press 
the [ENT] key.   

5.  If you selected WGS84 or WGS72, go to 

step 6. For OTHER, do the following: 
a) Press the [ENT] key. 
b) Use the cursor pad to enter chart 

number, referring to the geodetic chart 
list on page AP-3. 

c)  Press the [ENT] key. 

6.  Press the [MENU] key twice to finish. 
 
 

Distance/speed can be displayed in nautical 
miles/knots, kilometers/kilometers per hour, 
or statute miles/miles per hour. 
 
1.  Press the [MENU] key once or twice to 

open the menu. 

2.  Choose SYS SETUP and then press the 

[ENT] key. 

3. Choose UNITS. 
4.  Press the [ENT] key. 
5.  Choose combination desired; nm, kt; km, 

km/h; sm, mph. 

6.  Press the [ENT] key. 
7.  Press the [MENU] key twice to finish.