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7-3
PLOTTER SETUP
TRACK REC : DISTANCE
INTERVAL : 0.10 nm
BRG. REF. : MAG
MAG. VAR. : AUTO E16°
WYPT NAME : DSP GOTO
TRACK MEMORY USED 1%
Figure 7-7 PLOTTER SETUP menu
4. Select the BRG. REF. line.
5. Press the [ENT] key. The following win-
dow appears.
MAG
TRUE
Figure 7-8 Bearing reference 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 difference
is called magnetic variation, and varies with
respect to the observation point on earth. The
GP-30/35 is preprogrammed with all the
earth's magnetic variation. However, you
may wish to enter variation manually to re-
fine accuracy.
1. Press the [MENU] key twice.
2. Select PLOTTER and press the [ENT]
key.
3. Select the MAG. VAR. line.
4. Press the [ENT] key.
5. Select AUTO or MANU and press the
[ENT] key. For automatic magnetic
variation, current variation appears to the
right of AUTO.
6. If you selected AUTO, no further opera-
tion is necessary, press the [MENU] key
twice to finish. For MANU, 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) Enter variation in two digits with the
Cursor Pad, referring to a nautical
chart.
c) Press the [ENT] key.
d) Press the [MENU] key twice to fin-
ish.
7.5 Geodetic Chart System
Select the geodetic chart system you are us-
ing as follows:
1. Press the [MENU] key twice.
2. Select SYS SETUP and press the [ENT]
key.
SYSTEM SETUP
11–DEC–97 14: 20: 25
DATUM : WGS84
UNITS : nm, kt
TIME DIFF : +00 : 00
SELF TEST?
SIMULATOR?
Figure 7-9 SYSTEM SETUP menu
3. Press the [ENT] key.
4. Select WGS84, WGS72 or OTHER and
press the [ENT] key.
5. If you selected WGS72 or WGS84, press
the [MENU] key twice to finish. For
OTHER, do the following:
a) Press the [ENT] key.
b) Select chart number referring to the
geodetic chart list on page A-4.
c) Press the [ENT] key.
d) Press the [MENU] key twice to fin-
ish.