Using the Highway Page
The highway page also provides graphic steering
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 a
waypoint, along with your current track and speed are
displayed 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 toward 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 square 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 set-
ting 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.
Highway Page
Reference
49
In this example, the high-
way 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.
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 Scale
Distance to
Waypoint
Estimated
Time Enroute
Velocity
Made Good
Speed Over
Ground
Track Over
Ground
Destination
Waypoint
Pointer to Waypoint
170 manual pages rev D 9/21/98 9:23 AM Page 49