NorthStar 957 Operator's Manual page 55

Chapter 4 - Using the Chart Screen
Depth
The ON setting shows depth contour lines for low, mid, and
deep water areas, for any or all of the three depth levels.
Track line
The ON setting shows your vessel's track points (the course
you've already traveled). For more track display options, see
"Changing the track control" starting on page 47.
Waypoints
The ON setting shows your waypoints on the CHART screen,
and the OFF setting turns them off, with the exception of
waypoints on a route.
Nav aids
The ON setting shows nav aids from the Navionics chart
cartridge, and the OFF setting hides the nav aids.
Land masses
The ON setting shows the coloring of land masses to contrast
between water and land. The OFF setting shows only coastline,
without the coloring.
The 957 displays your track history as a series of dots
Changing the track
indicating the path you've recently traveled. You can choose
control
how often to store a position fix as a point in your track
history. The 957 stores up to 1,024 position fixes. When it
reaches this limit, the 957 starts erasing the oldest points to
add your new points to the track line. The more often you
mark your track, the faster you fill up the track memory. The
maximum track length depends on how often points are
stored.
To display the TRACK CONTROL screen, press the TRACK
CONTROL menu key on the CHART SETUP/STATUS screen.
957 Operator's Manual, Rev. B Page 47