NAVIGATE SETUP Menu
When you press
NAVIGATE
on NAVIGATION menu, the
NAV
I
GA
TE S
ETUP
menu appears. On this menu, you can automatically or
manually correct the course and bearing data of the echosounder to mag-
netic bearings, change the display of ship’s position between L/L or
(if
a loran C is connected), and assign the appropriate Loran C GRI for
converting
entered as waypoints into L/L coordinates.
3A3.1.1 Magnetic Correction
NAVIGATE MENU
I
Notice that the Navigation displays show various
bearings and ship’s course information.
This data can appear in
or
de-
grees. In general, when you are using your
echosounder data output to steer to a
or
operate with your autopilot, you will usually want
this bearing information to be in ‘Magnetic”. This
is accomplished by adding a variation to the
bearing data.
MAG
O F F
MAN
AUTO=+16
CHAIN
If the
is not already displayed on
the Navigate screen, the
can be pro-
PRESS MENU TO RETURN
grammed to automaticallyapplymagnetic variation values from an internal
D.M.A. variation table.
A.
Magnetic
To set Magnetic Variation to Automatic press
to
The
MAG
indicator will now appear in the middle of the
Position title bar and all Course and Bearing readouts will be
B.
Manual Magnetic
If the automatic magnetic variation value
displayed
for
your
L/L location, the proper value can be input manually in the following
manner:
To enter the Magnetic correction values manually, press
The “AUTO” selection will go to “OFF”. Enter the desired magnetic vari-
ation value with the numeric keys X, X. Press the A (up) direction key to
OPERATION 81
