NorthStar 958 Operator's Manual page 121

Chapter 8 - Understanding Waypoint/Route Navigation
Both screens help guide you precisely along a course line,
Choosing a steering
which might follow a harbor channel or a line between shoals
screen
and sandbars. Both screens graphically show your cross-track
distance, which is the distance you are from your course line.
Both screens show numeric navigation information at the top.
NOTE:
CHART
You can also use the screen to steer by when you want to get to
a waypoint and don't need to stay precisely on the designated course line.
Both screens show your distance and bearing to the waypoint,
Displaying distance
and your Speed-Over-Ground (SOG) and Course-Over-Ground
and bearing
(COG). Your 958 may show an arrow between the SOG and
COG displays, pointing upwards when the trend of your speed
is increasing, and down when it's decreasing.
When you're less than a mile away from a destination
waypoint, you can show the distance to the waypoint in feet
by setting the 958's steering distance precision option to HIGH.
For details, see "Changing the steering precision" starting on
page 171.
958 Operator's Manual, Rev. A Page 113