Course Deviation Indicator (Cdi) - Lowrance 100 Installation And Operation Instructions Manual

Lines on either side of the present position show the current cross track
error range. Cross track error is the distance you are off-course to the
side of the desired course line. The course line is an imaginary line drawn
from your position when you started navigating to the destination way-
point. It's shown on the screen as a vertical dotted line. The default for the
cross track error range is 0.25 mile. For example, if the present position
symbol touches the right cross track error line, then you are .25 mile to
the right of the desired course. You need to steer left to return to the
desired course. The cross track error is also shown in the "XTK" box. In
the upper right corner is the course (CRS) box show-
ing the direction from your starting position to the way-
point. Remember, a course is a proposed path from
the starting position to the destination. Track is your
actual direction of travel.
A circle depicting your destination appears on the
screen as you approach the waypoint as shown on the
screen at right.
Nav Screen #2
This navigation screen shows all navigation informa-
tion in large digital numbers. To view this screen, press
the PAGES key, then press an arrow key until the
"NAV1" label is highlighted. While it's highlighted, press
the right arrow key. The screen shown at right appears.
Press the EXIT key to erase the menu.
This screen is composed of eight digital boxes. Track
(TRK) and ground speed (GS) data are all that show if
you're not navigating to a waypoint. If you are navigat-
ing to a waypoint, then bearing (BRG), distance to
waypoint (DIS), estimated time en route (ETE), cross track error (XTK),
destination arrow, and the CDI also operate. See below for more informa-
tion on the CDI.
The destination arrow shows the direction to the destination when the top
of the screen is pointing in your direction of travel.

Course Deviation Indicator (CDI)

Once navigation to a destination is established, the CDI shows your dis-
tance to the left or right of the desired course. The vertical line in the box
shows both the direction you must steer to get back on course and the
distance to the course line. For example, if you're travelling straight to-
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