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Using the Highway Page
The GPS 125 Sounder’s Highway Page also pro-
vides graphic steering guidance to a destination, with a
greater emphasis on the straight-line desired course
and the distance and direction you are off course. The
bearing and distance to a waypoint--along with your
current track and speed--are displayed at the top of the
screen, with your digital depth, estimated time enroute
(ETE), and velocity made good (VMG, or the rate you
are closing in on your destination), at the bottom.
As you head toward your destination, the middle
section of the screen provides visual guidance to your
waypoint on a moving graphic “highway”.
Your present position is represented by the dia-
mond in the center of the course deviation scale. The
line down the middle of the highway represents your
desired track. As you navigate toward a waypoint, the
highway will actually move and indicate the direction
you are off course, relative to the position diamond on
the CDI scale. To stay on course, simply steer toward
the center of the highway.
If you do get off the desired course by more than
1/5th of the selected CDI range, the distance you are
off course will be displayed where the CDI scale setting
normally appears. If you get too far off course (the
highway has disappeared), a message box will appear
to indicate what course to steer to get back on course.
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In this example, the
Highway Page indicates
that you are off course to the
left. Steer right to get back
on course. Notice the
emphasis of the Highway
Page is on the desired
course.
REFERENCE
Highway Page
If you get too far off course,
a message box will appear
to indicate what course to
steer to get back on course
most efficiently.
Bearing to
Waypoint
Graphic
Highway
CDI
Distance to
Waypoint
Estimated
Time Enroute
Velocity
Made Good
Speed Over
Ground
Track Over
Ground
Destination
Waypoint
Digital Depth
Pointer to Waypoint
125 Man Rev B 7/23/98 11:48 AM Page 45