Garmin GPSCOM 170 - Manual (Page 55)

Using the Compass Page
The compass page provides graphic steering guidance
to a destination waypoint. The bearing (BRG) and dis-
tance (DST) to the waypoint are displayed at the top of
the page, right below the destination waypoint field. The
distance displayed is always the straight-line distance
from your present position to the destination waypoint.
The bearing indicates the exact compass heading from
you to the destination.
The middle of the page features a rotating ‘compass’ that
shows your current cardinal heading while you’re moving
(track up), with a pointer arrow in the center to indicate the
direction of the destination relative to the direction you are
moving. The compass rose and pointer arrow combine to
show current direction and current destination at a glance.
The bottom of the compass page displays your current
track (TRK) and speed (SPD) over the ground, while the
CDI (course deviation indicator) scale shows how far you
are off course. The diamond in the center of the CDI scale
represents your present position, while the d-bar (the mov-
ing vertical line on the scale) indicates the direction and dis-
tance you are off the desired straight-line course.
To stay on course, steer toward the d-bar until it is cen-
tered on the position diamond. The default setting of the
CDI scale is +/- 0.25 miles, with each mark representing
0.05 miles of course deviation. If you do get off course by
more than the selected scale, an arrow prompt will appear
at the end of the scale to indicate the direction you are off
course. When you are one minute away from the destina-
tion you will be alerted by a flashing on-screen
message box.
Compass Page
Reference
50
In this example, the com-
pass page indicates that you
are traveling in a easterly
(100º) direction and the
destination waypoint is
northeast (25º) of your cur-
rent direction of travel.
In this example, the com-
pass page indicates that you
are traveling in a westerly
(326º) direction and the
destination waypoint is
slightly north (359º) of your
current direction of travel.
Bearing to
Waypoint
Pointer to
Waypoint
Speed Over
Ground
Destination
Waypoint
Track Over
Ground
CDI Scale
Distance to
Waypoint
Graphic
Compass
170 manual pages rev D 9/21/98 9:23 AM Page 50