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Using the Highway Page
The GPS 38’s Highway Page also provides graphic steer-
ing guidance to a destination, with a greater emphasis on
the straight line desired course and the distance and direc-
tion you are off course. The bearing and distance to way-
point, along with your current track and speed are dis-
played at the top of the screen, with your 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 towards your destination, the middle sec-
tion of the screen provides visual guidance to your way-
point on a moving graphic “highway”. The moving arrow
just below the course deviation scale always points to your
selected waypoint relative to the direction you are moving.
Your present position is represented by the diamond 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, indicating the direction you’re 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 exact distance you are off
course will be displayed where the CDI scale setting nor-
mally appears (see the example at right). 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 most efficiently. As you approach a waypoint, a hori-
zontal “finish line” will move toward the bottom of the
highway. When the finish line reaches the CDI scale, you’ve
arrived at your destination.
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 desire d
course.
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.
R E F E R E N C E
Highway Page
39
Bearing to
Waypoint
Graphic
Highway
CDIScale
Distance to
Waypoint
Estimated
Time Enroute
Velocity
Made Good
Speed Over
Ground
Track Over
Ground
Destination
Waypoint
Pointer to Waypoint
GPS 38 Man Rev B 7/23/98 4:33 PM Page 39