Furuno GP-31, Руководство оператора

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7-5
Figure 7-12 Prompt for erasure of all user
channels
7. Press the [ENT] key to erase all user
channels.
Erasing individual user channels
1. Press the [MENU] key twice to open the
menu.
2. Select D-GPS and press the [ENT] key.
3. Select STATION and press the [ENT]
key.
4. Select LIST and press the [ENT] key.
5. Select USER and press the [ENT] key.
6. Select a channel from the list and press
the [ENT] key.
7. Select “ERASE?”.
8. Press the [ENT] key to erase channel
selected.
7.3 Bearing Reference
Ship's course and bearing to a waypoint
may be displayed in true or magnetic bear-
ing. Magnetic bearing is true bearing plus
(or minus) earth’s magnetic deviation. Use
the bearing reference according to com-
pass interfaced: magnetic for magnetic
compass, true for gyrocompass.
The default setting displays magnetic bear-
ings.
1. Press the [MENU] key once or twice to
open the menu.
2. Select PLOTTER.
3. Press the [ENT] key.
Figure 7-8 PLOTTER SETUP menu
4. Select the BRG. REF. field.
5. Press the [ENT] key. The following win-
dow appears.
Figure 7-9 Bearing reference
selection window
6. Select MAG or TRUE.
7. Press the [ENT] key.
8. Press the [MENU] key twice to finish.
7.4 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 differ-
ence is called magnetic variation, and var-
ies 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. When the option MAG
is selected on the item BRG REF., use
magnetic variation.
1. Press the [MENU] key once or twice to
open the menu.
2. Select PLOTTER and press the [ENT]
key.
3. Select the MAG. VAR. field.
4. Press the [ENT] key.