Furuno BACK GP-80 - Manual (Page 24)

2 – 6
2.11 Selecting Bearing
Reference
Ship's course and bearing to waypoint may
be displayed in true or magnetic bearing.
Magnetic bearing is true bearing plus (or mi-
nus) earth's magnetic deviation.
Displaying true or magnetic bearing
The default setting displays magnetic bear-
ings.
1) Press the [MENU ESC] key.
2) Press [9] to display the SYSTEM SET-
TINGS menu.
3) Press [1] to display the PLOTTER SETUP
menu.
4) Press ▲ or ▼ to select Bearing Ref.
5) Press t or s to select True or Mag.
6) Press the [NU/CU ENT] key, ▲ or ▼.
7) Press the [MENU ESC] key.
Entering magnetic variation
The location of the magnetic north pole is dif-
ferent from the geographical north pole. This
causes a difference between the true and mag-
netic north direction. This difference is called
magnetic variation, and varies with respect to
the observation point on the earth. Magnetic
variation may be entered automatically or
manually.
1) Press the [MENU ESC] key.
2) Press [9] to display the SYSTEM SET-
TINGS menu.
3) Press [1] to display the PLOTTER SETUP
menu.
4) Press ▲ or ▼ to select Mag Variation.
5) Press t or s to select Auto or Man. For
automatic, current variation appears in pa-
rentheses.
6) For manual entry, enter variation in two
digits, referring to a nautical chart. If the
variation is 10
°
, for example, press [1] [0].
7) If necessary, press the [ ] key to change
coordinate from east to west or vice versa.
8) Press the [NU/CU ENT] key.
9) Press the [MENU ESC] key.