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Magnetic Heading Reference
The GPS 125 Sounder’s heading information can be
displayed referencing magnetic north (auto or user-
defined), true north, or calculated grid headings. The
default setting is automatic magnetic north, which is
suitable for most applications.
To select a heading reference:
1. Highlight the ‘HEADING’ field and press
F
.
2. Select the desired heading preference.
3. Press the
F
key to confirm the selection.
To enter a user-defined magnetic heading
:
. 1. Select the ‘USER MAG’ option and press
F
.
2. Use the
U
and
D
keys to enter the degrees
and direction of magnetic variation.
3. Press the
F
key to confirm the magnetic
variation value.
Map Setup and Orientation
The map setup page lets you select map orientation
and specify what items are displayed. The map may be
oriented to north up, the direction of current travel
(track up) or the direction of an active route leg
(desired track up). The default setting is track up.
To change the map orientation:
1. Highlight the ‘ORIENTATION’ field and press
F
.
2. Use the
U
and
D
keys to toggle through and
select the desired setting, and press
F
.
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The ‘North Up” orientation
causes the top-center of the
Map Page to represent
000º, the right-center to be
090º, the bottom-center
180º, and the left-center to
be 270º.
REFERENCE
Magnetic
Heading & Map
Setup
To enter a user-defined
magnetic variation, select
the ‘User Mag’ option and
enter the desired direction
and value.
125 Man Rev B 7/23/98 11:48 AM Page 55