NorthStar 951X Operator's Manual page 130

Chapter 8 - Understanding Waypoint/Route Navigation
Understanding
cross-track distance
Page 120
If you set the steering-distance precision option to HIGH (see
"Adjusting steering-distance precision" starting on page 163),
the distance to the waypoint is displayed in feet whenever
you're less than one mile from the waypoint.
On the STEERING screen, the lower part displays your
cross-track distance, using a symbol of your boat to show your
distance from the course line. In addition, the direction of the
boat on the screen indicates the direction your boat is actually
traveling. The direction may not be the same as your heading
if any current or wind is present.
When the boat symbol points towards the course line, you're
moving closer to the line; when it points parallel to the course
line, you're keeping a constant distance from the line; when it
points away from the course line, you're moving further from
the line.
Two vertical lines near the edge of the screen indicate the lim-
its of off-course distance. An alert message will be given if
these limits are exceeded, and the image of your boat will flash
on and off. To display the alert message, press the 67$5 key;
to acknowledge and clear the message, press the &/($5
$/$50 menu key.
951/952 Operator's Manual Rev. B